Fix parsing dot-staffed lines in multiline text (#5838)

CHANGELOG

@@ -3,6 +3,7 @@ CHANGELOG Roundcube Webmail
 
 - Add Preferences > Mailbox View > Main Options > Layout (#5829)
 - Password: Fix compatibility with PHP 7+ in cpanel_webmail driver (#5820)
+- Managesieve: Fix parsing dot-staffed lines in multiline text (#5838)
 - Fix decoding non-ascii attachment names from TNEF attachments (#5646, #5799)
 - Fix uninitialized string offset in rcube_utils::bin2ascii() and make sure rcube_utils::random_bytes() result has always requested length (#5788)
 - Fix bug where HTML messages with @media styles could moddify style of page body (#5811)

plugins/managesieve/Changelog

@@ -1,3 +1,5 @@
+- Fix parsing dot-staffed lines in multiline text (#5838)
+
 * version 8.9 [2017-05-22]
 -----------------------------------------------------------
 - Fix handling of scripts with nested rules (#5540)

plugins/managesieve/lib/Roundcube/rcube_sieve_script.php

@@ -1277,11 +1277,13 @@ class rcube_sieve_script
                             $text    .= substr($str, $position, $pos - $position);
                             $position = $pos + 2;
 
-                            if ($str[$pos] == "\n"
+                            if ($str[$position] == "\n"
-                                || ($str[$pos] == "\r" && $str[$pos + 1] == "\n")
+                                || ($str[$position] == "\r" && $str[$position + 1] == "\n")
                             ) {
                                 break;
                             }
+
+                            $text .= "\n.";
                         }
 
                         // remove dot-stuffing

plugins/managesieve/tests/src/parser_vacation

@@ -5,6 +5,8 @@ if header :contains "Subject" "vacation"
 	vacation :days 1 text:
 # test
 test test /* test */
+..
+..test
 test
 .
 ;