40d7342dd9
Fix XSS issue in SVG images handling ( #1490625 )
9 years ago
39137fe292
CS fixes
9 years ago
d72e5afb47
Fix PHP7 warning "session_start(): Session callback expects true/false return value" ( #1490624 )
9 years ago
d08dc5bfc5
Fix so drag-n-drop of text (e.g. recipient addresses) on compose page actually works ( #1490619 )
9 years ago
10e5192a2b
Fix path traversal vulnerability in setting a skin ( #1490620 )
9 years ago
6521c20768
Add INBOX to the list of folders only if no filter and no prefix was specified
9 years ago
3b36bcfb68
Cleanup
9 years ago
0d9fa7f3dc
Remove redundant code
9 years ago
cd219a45dd
Fix regression where some message attachments could be missing on edit/forward ( #1490608 )
9 years ago
c3be175ce7
Fix PDF support detection in Firefox > 19 ( #1490610 )
9 years ago
be346095a0
Fix handling of message/rfc822 attachments on replies and forwards ( #1490607 )
9 years ago
bb6002f1a8
Fix also charset encoding of message/rfc822 part bodies ( #1490606 )
9 years ago
3296965f41
Force arg_separator in http_build_query()
9 years ago
87cb24d873
Don't add redundant URL arguments to logged error messages
9 years ago
f51145572a
Merge branch 'master' of github.com:roundcube/roundcubemail
9 years ago
6463b662ca
Fix regression in displaying contents of message/rfc822 parts ( #1490606 )
9 years ago
97aa984b29
Optionally throw 404 error when contact photo wasn't found
9 years ago
69a1e4f7b1
rcube_parse_host() -> rcube_utils::parse_host()
9 years ago
cbe701ac4a
Fix rcube_utils::words_match() to work with mixed/invalid/binary content (T844)
9 years ago
7476410a04
Add missing deprecation warning
9 years ago
458a6b26e8
Load bc.inc in script startup
9 years ago
32695c333c
Restore bc.inc which now logs a warning when calling deprecated functions
9 years ago
310d4939ba
Tweak recently added encryption functions to not violate ECMASCRIPT3 syntax
9 years ago
8271597836
Use ternary operator where applicable
9 years ago
648963afda
Added Talossan language to index
9 years ago
e257b830a1
Synchronize localizations from Transifex
9 years ago
7e3298753a
Use ternary operator where aplicable
9 years ago
a15d877ba8
Added brute-force attack prevention via login rate limit ( #1490566 )
9 years ago
7caa9f5f50
Fix error on dragging when search in treelist is active
9 years ago
454b0b1ca9
Remove deprecated rcmail and rcube_imap methods
9 years ago
9234903287
Fix HTML sanitizer to skip <!-- node type X --> in output ( #1490583 )
9 years ago
3b0318ca3e
Fix race-condition in setting current page between list and getunread requests
9 years ago
bcd3799954
Fix redundant blank lines when using HTML and top posting ( #1490576 )
9 years ago
2aa9ee56fd
Fix so disabling emoticons plugin really removes emoticons button from HTML editor
9 years ago
eb721e35b2
Update to TinyMCE 4.2
9 years ago
bc3518577d
Fix some more Q -> rcube::Q
9 years ago
234fd19505
Replace deprecated call to Q within array_map()
9 years ago
74ce01efc7
Q() -> rcube::Q()
9 years ago
eca19d65b5
Optimized some regular expressions
9 years ago
8f8beafd56
Use .get_label() consistently (instead of .gettext())
9 years ago
5d84dd6de5
Deduplicate code of http_post() and http_request(), add http_get() alias
9 years ago
2ff3385788
Fix warning when enchant_broker_list_dicts() does not return an array
9 years ago
a5c03db798
Security: Added options to validate username/password on logon ( #1490500 )
9 years ago
c1bbf0d0b6
After failed login wait a second to slow down brute-force attacks ( #1490549 )
9 years ago
fddfd8e6d7
Remove backward compatibility "layer" of bc.php ( #1490534 )
9 years ago
91dc7fabbc
Small improvements in HTML to text conversion.
...
Better handling of <body> and trailing spaces, and </p><div> or <br><div>.
9 years ago
92bcb940d4
Fix bug where HTML messages with invalid/excessive css styles couldn't be displayed ( #1490539 )
...
Technically speaking we remove the whole CSS content when it has more than 5k lines.
9 years ago
fe8ff85d7e
Move skin-specific code for compose encryption button to the skin
9 years ago
f1e7bbd1bd
Fix bug where message preview was unintentionally reset on check-recent action ( #1490563 )
9 years ago
d9ff47b011
Don't use deprecated (soon) jQuery .bind() and .unbind() methods
9 years ago
c8c4cafb1f
Add possibility to define date format in write operations for ldap attributes ( #1488741 )
9 years ago
bb1ed2740d
Display attachment size in compose ( #1484774 )
9 years ago
d560916065
Added possibility to drag-n-drop attachments from mail preview to compose window
9 years ago
5802e08e48
Mail messages searching with predefined date interval (T103)
9 years ago
a03233ceba
CS fixes
9 years ago
1484d5fb7f
Fix resetting search input events when the treelist is re-initialized, some CS improvements
9 years ago
e524680a13
Fix 'last' property of search event
9 years ago
354cff8b26
Some more CS fixes
9 years ago
7fb0aedc9b
Fix fetchMIMEHeaders() so it really works with multiple parts, various CS fixes
9 years ago
b813011902
Remove unused property
9 years ago
85f4209074
Code improvements: CS fixes, improved internal cache cleanup on folder selection, removed redundant cache
9 years ago
aada285660
Simplify change_subscription() code, removed unused vars
9 years ago
6a94f69bd1
Remove code for Mail_mime<1.9, we already require Mail_mime-1.10 for other reasons
9 years ago
2a6cf5bb0e
Fix responses list update issue after response name change ( #1490555 )
9 years ago
0ee57208b3
Add possibility to set PDO::ATTR_PREFETCH and PDO::ATTR_TIMEOUT via DSN string
9 years ago
1b61a48eec
Get rid of mb_check_encoding() before mb_convert_encoding() for better performance, CS fixes
9 years ago
83345af059
Log charset conversion warning only when no function was found, not when the string was invalid
9 years ago
7d71c48952
s/RCMAIL_VERSION/RCUBE_VERSION/
9 years ago
82dcbb7488
Fix various issues in Mailvelope integration ( #1490533 )
9 years ago
7bbb86f78a
Session read handler must return a string in PHP7
9 years ago
b2b9b591ce
Fix handling random_bytes() errors in PHP 7.0.0RC3
9 years ago
b95a6d8f41
Disable some toolbar buttons if Mailvelope editor is active ( #1490533 )
9 years ago
0b6a01380b
Distinguish encryption toolbar buttons (Mailvelope and Enigma)
9 years ago
df0b4f3437
Make sure an email address is valid when replacing it with mailto: link
9 years ago
db390a27fb
Do not tokenize search string when querying in strict mode ( #1490504 )
9 years ago
4cd087ea2e
Fixed mailvelope-generated messages structure (required Mail_Mime-1.10.0)
9 years ago
e250f00d90
Fix PHP warnings when sending mailvelope-encrypted mail
9 years ago
8716fca0d0
Small improvements
9 years ago
fef8537adb
Improved multi-folder search performance on sort order change or list page change
...
by proper index serialization and skipped redundant sorting
9 years ago
f7f75ff7d1
Unify detection of pgp/mime message part
9 years ago
f189d72943
Merged branch 'dev-mailvelope'
9 years ago
91ef2c812a
Small code improvement
9 years ago
e85bbc9e9c
random_bytes() can throw an exception in some cases, since PHP 7.0.0rc3
9 years ago
77be69fa25
Fix issue where Content-Length of some attachments could be set to wrong value causing browser errors ( #1490482 )
9 years ago
63e7937d02
Change so rcube_message class does not depend on $_GET parameters
9 years ago
c49234bd78
Fix bug where clicking date column with 'arrival' sorting would switch to sorting by 'date' ( #1490126 )
9 years ago
dd7db21797
Fix XSS issue in drag-n-drop file uploads ( #1490530 )
9 years ago
26086981a2
Improve randomness of security tokens ( #1490529 )
9 years ago
f75bc5c24b
Use random security tokens instead of hashes based on encryption key ( #1490404 )
9 years ago
e4c66080a8
Improved encrypt/decrypt methods with option to choose the cipher_method ( #1489719 )
9 years ago
fdbb1c95ea
Fix missing HTTP_X_FORWARDED_FOR address in generated Received header
9 years ago
91018f38d4
Fix so In-Reply-To header is set also for MDN receipts ( #1490523 )
9 years ago
4c53e78915
Fix printing required ini options values in error message
9 years ago
e2f605d44d
Fallback to C locale
9 years ago
3c29c7e858
Fix various issues with Turkish (and similar) locales ( #1490519 )
9 years ago
399a2d68b6
Make optional adding of standard signature separator - sig_separator ( #1487768 )
9 years ago
427ab2f393
Optimize folder_size() on Cyrus IMAP by using special folder annotation ( #1490514 )
9 years ago
5eb9c70b60
Added method to determine IMAP server vendor, for future use
9 years ago
4d36da83b2
Fix support for Mozilla-based browsers, e.g. Pale Moon ( #1490517 )
9 years ago
c4daf3f14f
Fix regression in converting signatures to text, fixed PHP warning in html2text() call
9 years ago
86b241df63
CS fixes
9 years ago
4ceff8f353
Make optional hidding of folders with name starting with a dot - imap_skip_hidden_folders ( #1490468 )
9 years ago
6ca1e6add1
Add option to enable HTML editor always, except when replying to plain text messages ( #1489365 )
9 years ago
87d6d214f9
Fix disabled_buttons option
9 years ago
a63f14ec40
Emoticons-related code refactoring
...
- Emoticons: All emoticons-related functionality is handled by the plugin now
- Emoticons: Added option to switch on/off emoticons in compose editor (#1485732 )
- Emoticons: Added option to switch on/off emoticons in plain text messages
- Plugin API: Added disabled_plugins an disabled_buttons options in html_editor hook
- Plugin API: Added html2text hook
9 years ago
3516b02344
Fix so adding CC/BCC recipients from the sidebar unhides compose form fields in Classic skin ( #1490472 )
9 years ago
8297ea1dcf
Fix handling of plus character in mailto: links ( #1490510 )
9 years ago
f00e1f5333
CS fixes
9 years ago
bd82e9551f
Fix so css of one html part does not apply to other text parts on message display ( #1490505 )
9 years ago
7417893c22
Fix closing of nested menus ( #1490443 )
9 years ago
60ab554003
Remove common subject prefixes Re:, Re[x]:, Re-x: on reply ( #1490497 )
9 years ago
6f249b0e38
Change code so versions of Mail_mime before and after 1.9.0 are supported
9 years ago
3fa3f156ca
Don't display not-sent-warning in compose page on save-pref action
9 years ago
c4383b5f3d
Fix selecting a folder on collapse when any subfolder is selected
9 years ago
284aac2883
Really make base64 encoding unicode-aware
9 years ago
c16ac71416
Fix base64.encode/decode for unicode characters - use fallback if btoa/atob functions fail
9 years ago
7a42173a16
Simplify rcube_utils::check_ip()
9 years ago
6b31846c43
Fix IPv6 address validation on PHP with disabled IPv6 support
9 years ago
c360e178c4
Fix so input field (e.g. search box) does not loose focus on list load ( #1490455 )
9 years ago
f4c512336d
Fix "washing" of style elements wrapped into many lines
9 years ago
cf69daf896
Merge pull request #288 from ThijsFeryn/fnnonempty
...
Emptying the display name when the display name is the main e-mail ad…
9 years ago
6c69e3d3ed
Add localization alias for tr => tr_TR
9 years ago
559e5d7bd4
Fix unintentional error_reporting change
9 years ago
36bd93f138
PHP7: Fixed some E_WARNING errors that previously were E_STRICT
9 years ago
a7efdd7c5d
Make Mail_mime>=1.9.0 a requirement, fix compat. errors
9 years ago
1b8ca08e5b
Added GSSAPI/Kerberos authentication plugin - krb_authentication
9 years ago
92649075ec
CS fixes
9 years ago
0868c2e841
Make sure list page is never set to 0 ( #1490458 )
...
This should fix the issue where after message move wrong message was
added to the list and the list counter was invalid.
9 years ago
5ed8ade763
Fix bug where some plugins could be initialized more than one time
9 years ago
93e64008a6
Small code improvements
9 years ago
4f6b660433
Thunderbird (fi_FI) support for csv2vcard
9 years ago
08bb20f261
Don't use deprecated functions/constants (from bc.inc)
9 years ago
9fc6918420
Disable links list generation on html-to-text conversion of identities or composed message ( #1490437 )
9 years ago
8449e936f3
Fix removing signature when switching to identity with an empty sig in HTML mode ( #1490470 )
9 years ago
d5f6d655da
Workaround TinyMCE issue with <p> </p> sequence ( #1490463 )
9 years ago
2965a981b7
Allow to search and import missing PGP pubkeys from keyservers using Publickey.js
9 years ago
bcbc459d2c
Fix regex quoting
9 years ago
4b72a1f498
Fix error when using back button after sending an email ( #1490009 )
9 years ago
3d0747957e
Fix some javascript errors in rare situations ( #1490441 )
9 years ago
8b40575b5c
Fix wrong positioning of message list header on page scroll in Webkit browsers ( #1490035 )
9 years ago
c21f95f626
Fix bug where new messages weren't added to the list in search mode
9 years ago
6c7be218f7
Revert create_folder() behaviour change where the method didn't fail if folder already existed.
...
This should not be the default behaviour. It could likely
become an optional functionality, however we should keep the method simple.
9 years ago
0c8794c94f
Use in_array_nocase() also for \\Noselect flag check ( #1490466 )
9 years ago
9d78c68cbf
Fix so imap folder attribute comparisons are case-insensitive ( #1490466 )
...
+ make in_array_nocase() much faster for ASCII strings
9 years ago
8b0d817919
Fix draft removal after a message is sent and storing sent message is disabled ( #1490467 )
9 years ago
58f6f19505
Emptying the display name when the display name is the main e-mail address contradicts lines 731 till 734
9 years ago
252cc4c4ac
Password: Allow temporarily disabling the plugin functionality with a notice
9 years ago
b71eef6d7d
Don't use private properties of Net_SMTP object
9 years ago
9335f9cede
Reset internal cache index in close()
9 years ago
602d7422df
Fix bug where some messages in multi-folder search couldn't be printed/downloaded ( #1490426 )
9 years ago
8bed5e0151
Fix regression where compose editor mode was set incorrectly
9 years ago
3db9db1058
Update to TinyMCE 4.1.10 ( #1490405 )
9 years ago
19246792c6
Fix so *-request@ addresses in Sender: header are also ignored on reply-all ( #1490452 )
9 years ago
e2bceaefe6
Support more secure hashing algorithms for auth cookie - configurable by PHP's session.hash_function ( #1490403 )
9 years ago
7185736f39
Use jQuery's .on() instead of a deprecated .load()/.unload()
9 years ago
843643b1bd
Fix multi-folder search result sorting by arrival date ( #1490450 )
9 years ago
212e332cef
Get rid of array_walk() when simple foreach() can be used
10 years ago
d2890372c1
Fix Fatal error after last commit
10 years ago
6a8c4fc73b
Fix issue when first search() argument is not an array
10 years ago
8447bae77c
Require Mbstring and OpenSSL extensions ( #1490415 ) - remove redundant code
10 years ago
f7427f151e
Get rid of Mail_mimeDecode package dependency ( #1490416 )
10 years ago
9aae1b7fc3
Fix so microseconds macro (u) in log_date_format works ( #1490446 )
10 years ago
56a4e1512c
Fix a mistake in last small refactoring which broke identity selection
10 years ago
1414e3b6f8
Small refactoring to make some code testable
10 years ago
a567d85bf9
Fix self-reply detection issues ( #1490439 )
10 years ago
25c8fe4eeb
Fix handling of non-break spaces in html to text conversion ( #1490436 )
10 years ago
b92a66b3ee
Make has_(html|text)_part and first_(html|text)_part methods consistent in arguments and functionality
10 years ago
36a7f57345
Modify rcube_smtp::send_mail() so it is possible to send message by
...
specifying only the message stream no headers, it's for cases when
the stream already contains a complete message.
10 years ago
ff40683404
Fix so links with href == content aren't added to links list on html to text conversion ( #1490434 )
10 years ago
26a00e76be
Fix race-condition in saving user preferences and loading plugin config ( #1490431 )
10 years ago
8e4dc03867
Fix unintentional messages list page change on page switch in compose addressbook ( #1490427 )
10 years ago
a79e43a483
Remove redundant folder name from mail preview url
10 years ago
04a6889246
Fix bug where some messages in multi-folder search couldn't be opened ( #1490426 )
10 years ago
a958748947
CS fixes
10 years ago
10044b9033
Fix Compose action in addressbook for results from multiple addressbooks ( #1490413 )
10 years ago
e2002741c5
Update to jQuery 2.1.4 ( #1490406 )
10 years ago
42f8abac46
Fix "Importing..." message does not hide on error ( #1490422 )
10 years ago
53ccaa1a0f
remove debug test code
10 years ago
babc30c4f2
Add 'compose-encrypted' command later if Mailvelope API is detected
10 years ago
3167e58ff9
Pass encrypted draft and reply messages to Mailvelope editor; add toolbar icon for encryption mode toggeling
10 years ago
40d152cfdc
Make encrypted pgp/mime message composition work
10 years ago
b782815dac
Fix XSS vulnerability in _mbox argument handling ( #1490417 )
10 years ago
c044d301ea
Fix blank image in html_signature when saving identity changes ( #1490412 )
10 years ago
d375b20225
Suppress E_DEPRECATED errors after change in [ 4ab77dd1]
10 years ago
4ab77dd13e
Check for PEAR class before accessing it. With new composer modules this isn't necessary in the include path anymore
10 years ago
7b8a0af1c8
Add toolbar button to switch to Mailvelope encryption editor
10 years ago
1cd3762b0d
Start integrating the Mailvelope browser extension via its API.
...
- Embed Mailvelope message container for encrypted message text and full pgp-mime messages
- Prepare to embed the Mailvelope editor for composing encrypted messages (with attachments)
10 years ago
8042e13af6
Add --config and --type options to moduserprefs.sh script ( #1490051 )
10 years ago
a84f0b65dc
Fix undefined variable use after recent changes ( #1490401 )
10 years ago
3994b3a26c
Installer: Use openssl_random_pseudo_bytes() (if available) to generate des_key ( #1490402 )
10 years ago
5e97294372
Add new plugin hook 'identity_create_after' ( #1490358 )
10 years ago
0c08b04778
Fix issues when using moduserprefs.sh without --user argument ( #1490399 )
10 years ago
59d11dce33
Small code improvement
10 years ago
c4ad7edd53
Fix font artifacts in text2html conversion ( #1490353 )
...
Use white-space:nowrap elements instead of unicode word-joiner character
10 years ago
03aa84f784
Fix bug where some files could have "executable" extension when stored in temp folder ( #1490377 )
10 years ago
b120d42f5b
Improved cache index changes detection (again)
10 years ago
044c1a0523
Simplified code + some CS fixes
10 years ago
652e11f82e
Fix missing index update after write() call
10 years ago
b1e35a685c
Performance: Improve changes detection, so we update index only if needed
10 years ago
11d5e7c100
Implemented memcache_debug also for session operations
10 years ago
9ed8584c3e
Count memcache/apc debug lines
10 years ago
fff8e0f2ae
Fix possible memcache/apc cache data consistency issues ( #1490390 )
...
And removed unused code
10 years ago
247b845a8e
Workaround possible issue where some keys were ignored when deleting cached entries
...
by key name prefix and keys index is in inconsistent state (does not contain all keys)
10 years ago
44708ec647
Implemented memcache_debug and apc_debug options for cache operations tracking
10 years ago
e84fafcec2
Fix security issue in contact photo handling ( #1490379 )
10 years ago
bb21913387
Fix mb_substitute_character() use
10 years ago
966a9086a5
Fix rcube_charset::clean() for case when mbstring and iconv are not installed
10 years ago
1422b0823e
Fix bug where messages count was not updated after message move/delete with skip_deleted=false ( #1490372 )
10 years ago
de40ef6cdb
Merge pull request #274 from fmbiete/es_ES-csv2vcard
...
csv2vcard: Add mappings for spanish versions of programs
10 years ago
0f63418b7e
Use Net_LDAP3::domain_root_dn() to resolve the domain DN for the %dc variable; replaces PR #268
10 years ago
9d49c820bd
Fix so pagejump selection list can be displayed again with click after it has been closed by Esc key
10 years ago
820be47e30
Reset pagejumper input to current page on ESC/TAB press
10 years ago
9a5d9a83ab
Implemented UI element to jump to specified page of the messages list ( #1485235 )
10 years ago
77bb126b00
fix(csv2vcard): Add mappings for spanish versions of Thunderbird
...
and Outlook.
The titles in the CSV generated by the localized versions of those
programs are also localized. Not every field, but some of them.
Signed-off-by: Francisco Miguel Biete <fbiete@gmail.com>
10 years ago
1aa0c8ad66
Fix bug where preview_pane setting wasn't always saved into user preferences ( #1490362 )
10 years ago
1d0ffdc2ac
Fix decoding array headers
10 years ago
c095e6329c
Fix message highligh regression from last commit ( #1490363 )
10 years ago
28331d5ed2
Trigger 'listupdate' event also on response to check-recent request
10 years ago
1af5595b90
Fix mouseup event handling when dragging a list record ( #1490359 )
...
This fixes drag-n-drop on managesieve filters list.
10 years ago
5b737d9f8d
Fix bug where some unrelated attachments in multipart/related message were not listed ( #1490355 )
10 years ago
09225a41ec
Add option to place signature at bottom of the quoted text even in top-posting mode [sig_below]
10 years ago
e7620812b0
Installer: Remove system() function use ( #1490139 )
...
Move some functionality of scripts from bin/ into rcmail_utils class
10 years ago
e8e88d347d
Fix bug where forced extwin page reload could exit from the extwin mode ( #1490350 )
...
With small improvements in rcube_webmail.url() method.
10 years ago
d86ff98339
Fix font artifact in Google Chrome on Windows ( #1490353 )
10 years ago
53cbebf8ad
Fix handling spaces after <br> on html2text conversion
10 years ago
aa38c512fb
Fix lack of signature separator for plain text signatures in html mode ( #1490352 )
10 years ago
d61d668b64
Remove useless code
10 years ago
292292df32
Fix so unrecognized TNEF attachments are displayed on the list of attachments ( #1490351 )
10 years ago
98e4614b0d
Fix so text/calendar parts are listed as attachments even if not marked as such ( #1490325 )
10 years ago
48d01837a0
Fix tables listing routine on mysql and postgres so it skips system or other database tables and views ( #1490337 )
10 years ago
5a4f3f8266
Remove Kolab's hack for Cyrus Murder bug in SETANNOTATION - it's not needed anymore
10 years ago
d9c22ab66d
move header block inside loop
10 years ago
3d6ce95009
Fix PHP warning: Non-static method PEAR::setErrorHandling() should not be called statically ( #1490343 )
10 years ago
0a4e0921d3
Plugin API: Added message_ready hook - the last chance to modify Mail_Mime object before saving or sending the message
10 years ago
1a7e668977
Fix handling of %-encoded entities in mailto: URLs ( #1490346 )
10 years ago
4d9627c36a
Wording
10 years ago
0bd99db08d
Localize common error messages; improve explanation for CSRF check failures
10 years ago
465ba8d11b
Avoid errors when message list doesn't have a header
10 years ago
8eeb721bd6
Fix unintended DB session expiration - lost variable in refactoring ( #1490316 )
10 years ago
65e735dec5
Fix javascripts errors in IE8 - lack of Event.which, focusing a hidden element ( #1490318 )
10 years ago
d17975c776
Do not re-append an existing node when re-rendering with childs
10 years ago
b1d13e8bd5
Fix redirct URL for attachments loaded in an iframe ( #1490191 )
10 years ago
e2fb340289
Remove obsolete mt_srand() calls
10 years ago
a74d023903
Generate random hash for the per-user local storage prefix ( #1490279 ); only unserialize user prefs once
10 years ago
496972bf95
Fix backtick character handling in sql queries ( #1490312 )
10 years ago
a172f39ff7
Fix bug where TinyMCE area height was too small on slow network connection ( #1490310 )
10 years ago
3c4d3dcc42
Fix submission of _reload parameter when switching address books
10 years ago
27da86be48
Merge branch 'master' of github.com:roundcube/roundcubemail
10 years ago
b0bb38703e
Fix bug where spellchecking in HTML editor do not work after switching editor type more than once ( #1490311 )
10 years ago
5def0d8e9e
Ignore plugin loading filter if force parameter is set
10 years ago
Aleksander Machniak