Commit Graph

6304 Commits (hughns/device-signing-upload-uia)
 

Author SHA1 Message Date
Kegan Dougal f9fd916dac
Update 3967-device-signing-upload-uia.md 2 days ago
Kegan Dougal 267ee096d9
Update 3967-device-signing-upload-uia.md 4 days ago
Kegan Dougal c99401b22a
Update proposals/3967-device-signing-upload-uia.md
Co-authored-by: Travis Ralston <travisr@matrix.org>
4 days ago
Kegan Dougal ee8f7178a5
Update 3967-device-signing-upload-uia.md 5 days ago
Kegan Dougal 36c750cb23
Update 3967-device-signing-upload-uia.md 4 weeks ago
Kegan Dougal 6d1c02922f
Update 3967-device-signing-upload-uia.md 4 weeks ago
Kegan Dougal ae7a731514
Update proposals/3967-device-signing-upload-uia.md
Co-authored-by: Travis Ralston <travisr@matrix.org>
1 month ago
kegsay 9c728d5eb3
Update 3967-device-signing-upload-uia.md 3 months ago
Hugh Nimmo-Smith 5bcf40b612 Line length 1 year ago
Hugh Nimmo-Smith e2c02ae136 Issue with Synapse compliance is being tracked elsewhere 1 year ago
Hugh Nimmo-Smith c8318919f7
Suggestion from review 1 year ago
Hugh Nimmo-Smith 21b36a17c0
Apply suggestions from code review
Co-authored-by: Denis Kasak <dkasak@termina.org.uk>
1 year ago
Hugh Nimmo-Smith 11500f2577 Lint length 1 year ago
Hugh Nimmo-Smith c14d424935 MSC3967: Do not require UIA when first uploading cross signing keys 1 year ago
Hugh Nimmo-Smith 8cde3781be Placeholder 1 year ago
David Robertson 26f5effe45
MSC3943: Partial joins to nameless rooms should include heroes' memberships (#3943)
* Draft

* Assign MSC number

* Fix underscores inside backticks

* typo fix

Co-authored-by: Erik Johnston <erikj@jki.re>

Co-authored-by: Erik Johnston <erikj@jki.re>
1 year ago
Hubert Chathi 9b3f01b019
MSC3783: Fixed base64 for SAS verification (#3783)
* proposal for using fixed base64 encoding

* use MSC number

* add missing word

* add links to spec and clarifications
1 year ago
Catalan Lover b5bf09ea1c
MSC3904: Room version 10 as the default room version (#3904)
* Initial Commit for Room version 10 as default

* fix filename

* Give file and filename its MSC number

* Add update progress information

* Update 3904-room-version-10-as-a-default.md
1 year ago
Richard van der Hoff 006ca6a95a
remove keyId from /keys endpoints (#3938) 1 year ago
Richard van der Hoff 9a80bcffb6
MSC3706: Extensions to `/_matrix/federation/v2/send_join/{roomId}/{eventId}` for partial state (#3706) 1 year ago
Travis Ralston 4093b15124 Spelling 2 years ago
Eric Eastwood 8e46b7c5c8 MSC3030: Jump to date API endpoint (#3030)
* Initial MSC draft for jump to date

* Update with alternate /timestamp_to_event endpoint

* Add origin_server_ts for quick remote to local comparison

As discussed at https://github.com/matrix-org/synapse/pull/9445#discussion_r757098009

* Add origin_server_ts to client endpoint

* Wrap lines

* Use stable when discussing MSC and document unstable

* Describe the direction parameter

* Add server support detection

* Fix typos

* Explain what happens when an event can't be found

Fix https://github.com/matrix-org/matrix-doc/pull/3030#discussion_r787002549

* Add context behind why we chose /timestamp_to_event vs alternatives

Fix https://github.com/matrix-org/matrix-doc/pull/3030#discussion_r785425438

* Add comments about authentication and rate-limiting

Fix https://github.com/matrix-org/matrix-doc/pull/3030#discussion_r786351083

* Return pagination token directly in future iteration

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r787297190

* Abuse /timestamp_to_event to get create event

As suggested by @turt2live,
https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r846444317

* Unrenderable events

As proposed by @turt2live,
https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r846447351

* Add some complication thoughts around alternatives

Context: https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r846449709

* Backfill event so we can get pagination token

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r846578171

* Heuristic for which server to try first

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r967574944

* Give a suggestion on where to backfill from

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r967574843

* Add alternative suggestion from @alphapapa

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r868478333

* Better wording and fix typo

Co-authored-by: Travis Ralston <travisr@matrix.org>

* No difference in homeservers

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r992858188

* Fix typos

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Fix extra word typo

* Summarizing discussion around why `dir` instead of closest

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r849310414

* Adjust to just suggest the right way

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r999099294

* Great simplification with the same meaning 🌟

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Perfect is the enemy of good

See https://github.com/matrix-org/matrix-spec-proposals/pull/3030#discussion_r1004651959

Co-authored-by: Travis Ralston <travisr@matrix.org>
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago
Andrew Morgan 7e91b8eb71
Encourage MSC authors to write their own spec PRs (#3921) 2 years ago
Patrick Cloke 0ff35b275a
MSC3743: Standardized error response for unknown endpoints (#3743)
* Add an MSC for unknown endpoints.

* Fix typo.

* Fix typo.

Co-authored-by: Val Lorentz <progval+github@progval.net>

* Minor clarifications.

* Updates due to reality.

* Fix footnotes.

* Fix typo.

* Check additional things.

* Formatting & note about why the entire prefix.

* Clarify unknown endpoint vs unknown method.

Co-authored-by: Val Lorentz <progval+github@progval.net>
2 years ago
Eric Eastwood f8da206fc7
MSC3905: Application services should only be interested in local users (#3905)
* MSC so appservices only interested in local users

Fix https://github.com/matrix-org/matrix-spec/issues/1272

* Add MSC number

* Fix typo

* Fix title

* Add example implementation

See https://github.com/matrix-org/matrix-spec-proposals/pull/3905#discussion_r993004036

* `rooms` and `aliases` not affected

See https://github.com/matrix-org/matrix-spec-proposals/pull/3905#discussion_r993003476

* Add historical context

See https://github.com/matrix-org/matrix-spec-proposals/pull/3905#discussion_r993005189

* Document how to do unstable

See https://github.com/matrix-org/matrix-spec-proposals/pull/3905#discussion_r992960361

* fix some typos

* Add link to spec

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Co-authored-by: Andrew Morgan <andrew@amorgan.xyz>
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago
Andrew Morgan 1676be343d
Update the README with details on the Matrix spec process + unstable prefixes (#3891)
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago
Travis Ralston 85e0444735
Misc clarifications to threading MSCs (#3899)
* Thread bundles exclude ignored users

Per implementation: https://github.com/matrix-org/synapse/pull/12235

* Clarify that the threads list API returns a 403 too

Per implementation: https://github.com/matrix-org/synapse/pull/13394

* Reference a token that actually exists
2 years ago
Patrick Cloke aa51353fde
MSC3856: Threads List API (#3856)
* Initial MSC3856 draft.

* s/filter/include/g

* Fix typo.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Add link to the current spec.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Link to MSC3440 for related_by_rel_types.

* Rework and clarify intro.

* Clarify what is returned by the API.

* Add a note on dir.

* Add info on ignored users.

* Clarifications from review.

Co-authored-by: Travis Ralston <travisr@matrix.org>

* Add notes about MSC2836.

* Add a comma to enum values.

Co-authored-by: Erik Johnston <erik@matrix.org>

* Simplify pagination.

* Fix typos.

Co-authored-by: Alexey Rusakov <Kitsune-Ral@users.sf.net>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Co-authored-by: Travis Ralston <travisr@matrix.org>
Co-authored-by: Erik Johnston <erik@matrix.org>
Co-authored-by: Alexey Rusakov <Kitsune-Ral@users.sf.net>
2 years ago
Patrick Cloke 3b43d871c5
MSC3771: Read receipts for threads (#3771)
* Add initial MSC for read receipts for threads.

* Fix events in diagram.

* Add sync response.

* Link to the spec.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Clarify sentence.

* Some clarifications.

* Simplification.

* Fix JSON key format.

Co-authored-by: Tulir Asokan <tulir@maunium.net>

* Add information on clearing notifications.

* Fix example.

* Update with current understanding.

* Clarify introduction.

* MSC3773 is not yet accepted.

* Updates from feedback.

* Update from learnings from the proof of concept.

* Add link to the current spec.

Co-authored-by: Travis Ralston <travisr@matrix.org>

* Clarify that false positives are deliberate in the design.

* Receipts must move forward.

* More info on unthreaded receipts.

* Reflow.

* Clarify the proposal to explain why both threaded and unthreaded receipts need to exist and what the main timeline is.

* Add information about validating that an event is part of a thread.

* Remove section on second-order relations.

* Use proper syntax highlighting.

Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

* Clarify unthreaded vs. main timeline receipts.

* Fix typos.

Co-authored-by: Hubert Chathi <hubertc@matrix.org>

* Clarify wording.

Co-authored-by: Hubert Chathi <hubertc@matrix.org>

* Clarify example.

Co-authored-by: Hubert Chathi <hubertc@matrix.org>

* Fix alternatives section.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Co-authored-by: Tulir Asokan <tulir@maunium.net>
Co-authored-by: Travis Ralston <travisr@matrix.org>
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
Co-authored-by: Hubert Chathi <hubertc@matrix.org>
2 years ago
Patrick Cloke 39f804004b
MSC3715: Add a pagination direction parameter to `/relations` (#3715)
* Add MSC for dir & filter on /relations.

* Fix typo.

* Simplify additional parameters.

* Add alternative.

* Add an unstable prefix.

* Move note about backwards compat.

* Add a link.

* Clarify proposal.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Re-title MSC

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Document another alternative.

* Add note about prev_batch token.

* Clarifications from review.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Flesh out description.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago
Patrick Cloke 9d80dcb6bd
MSC3773: Notifications for threads (#3773)
* Add initial MSC for notfications for threads.

* No longer depends on MSC3664.

* Fix events in diagram.

* Major simplification.

* Add missing words.

* Add a note about reactions.

* Clarify homeserver behavior when processing push rules.

* Link to a spec version instead of latest.

Co-authored-by: Travis Ralston <travisr@matrix.org>

* Update 3773-notifications-for-threads.md

typoe

* Clarify wording.

* Update how homeservers are to partition threads.

Co-authored-by: Travis Ralston <travisr@matrix.org>
Co-authored-by: Matthew Hodgson <matthew@matrix.org>
2 years ago
Travis Ralston 4e1b56247b
Add description of `m.receipt` behaviour to MSC2285 (#3875)
This appears to have been missed/edited out as part of one or more refactors of the MSC.
2 years ago
Richard van der Hoff c3eb6ac6da
Update CONTRIBUTING.md
simplify links
2 years ago
Travis Ralston f139eee50d
Clarify that MSC3827 also affects federation endpoints (#3858)
https://github.com/matrix-org/synapse/pull/13031 originally added support for the feature to Synapse, which although doesn't include an obvious federation route it does end up sending the field over federation.

[Here](a6895dd576/synapse/federation/transport/client.py (L481)) the server copies the search filter just before it goes over the wire, which is supplied by through a chain of function calls originating [here](c6d6176411/synapse/rest/client/room.py (L456)). 

Additionally, it is clear that this sort of feature would have included federation given the filtering is able to be proxied directly like this (as demonstrated by Synapse above).

As such, this is determined to be a clarification/minor edit to the MSC, not requiring a second MSC to add the functionality.
2 years ago
Travis Ralston dbc7937cd0
Clarify accidentally-legal `invite->knock` membership transition (#3850) 2 years ago
Travis Ralston 0d1605283c Minor spelling fixes 2 years ago
Aminda Suomalainen 43a3620edf
MSC3818: Copy room type on upgrade (#3818)
* add proposal xxxx-copy-room-type-on-upgrade.md

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

* MSC 3818: add MSC number

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

* msc3818: remove template text from beginning

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

* 3818-copy-room-type-on-upgrade: refer to the current version of spec and what to change

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

* Update proposals/3818-copy-room-type-on-upgrade.md

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

Co-authored-by: Andy Balaam <mail@artificialworlds.net>

* Update proposals/3818-copy-room-type-on-upgrade.md

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* 3818-copy-room-type-on-upgrade.md: specify v1.2 in links

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

* 3818-copy-room-type-on-upgrade.md: correct link for MSC3588

Signed-off-by: Aminda Suomalainen <suomalainen+git@mikaela.info>

* MSC3818: note potential issue when state events are needed

* MSC3818: note an alternative of all room types needing an MSC

Co-authored-by: Andy Balaam <mail@artificialworlds.net>
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
2 years ago
Šimon Brandner 0f067f1548
Specify how servers detect support for MSC3827 (#3854)
Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>
2 years ago
Travis Ralston 1ec0d5824f
MSC3844: Remove unused policy room sharing mechanism (#3844) 2 years ago
Robert Long d15a6a34d6
MSC3828: Content Repository CORP Headers (#3828) 2 years ago
Šimon Brandner 129e5e982e
MSC3827: Filtering of `/publicRooms` by room type (#3827) 2 years ago
Hubert Chathi 1bfa09cc2a MSC2676: Message editing (#2676)
* initial version of message editing proposal

* fix MSC numbers

* Fix JSON in example

Co-authored-by: Alexandre Morignot <erdnaxeli@gmail.com>

* clarifications

* remove obsolete "XXX:", and fix a typo

* Initial cleanup and restructuring

* Clarify algorithm for replacing content

* background

* More clarifications on applying edits

* Clarify behaviour of redactions

* Minor grammar fixes

* Move the section on `msgtype` down

It clutters up the initial description - let's move it down into a more
detailed section.

* Clarify how edits are ordered

- we use event_id as a tiebreaker.

We also have a section in "Future considerations" about this, so I don't think
we need the braindump in "Edge cases".

* Spec the behaviour for encrypted events

* Requirements for an edit event to be considered valid

* Collect "client behaviour" and "sever behaviour" together

... and clarify these sections.

* Clarify permalinks section

* Notes on edits of replies

* Clarify that `m.relates_to` within `m.new_content` is ignored

* Clarifications from review

* event ids are sorted lexicographically

* Clarify aggregation section

* minor clarifications

* Clarify which endpoints support edits

* move definition of latest edit

* Apply suggestions from code review

Co-authored-by: Hubert Chathi <hubert@uhoreg.ca>

* fix typo

* Attempt to clarify encrypted events

Co-authored-by: Alexandre Morignot <erdnaxeli@gmail.com>
Co-authored-by: Richard van der Hoff <richard@matrix.org>
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago
Travis Ralston 17e3cc17bf MSC2285: Private read receipts (#2285)
* What if we let people hide their read receipts?

* Add unstable prefix

* Update proposals/2285-hidden-read-receipts.md

Co-authored-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Use a separate `receiptType` for hidden read receipts  (#3750)

* Update the way MSC2285 works

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Update proposals/2285-hidden-read-receipts.md

Co-authored-by: Travis Ralston <travpc@gmail.com>

* Clarify notification behaviour and other things

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Mention adding `m.fully_read` to `/receipt`

* Rename MSC to `Private read receipts`

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Apply suggestions from review

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Apply suggestions from review

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Remove trailing comma

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Apply suggestions from review

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Apply suggestions from review

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* `r0` -> `v3`

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Describe how to determine server support while stable

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Be more precise about the failure mode

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Improve wording

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Improve wording

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Improve wording

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Be more explicit

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Be more explicit around server support

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Simplify text

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Be more explicit about detecting server support

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Add note about consistency

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Clarify how exactly to detect support

* Try to fix clarity around precedence

* Be clearer about alternatives

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Add sentence about `/receipt` federation

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Be more explicit about adding `m.read.private` to `/receipt`

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Fix wrong RR type

Co-authored-by: Kévin Commaille <76261501+zecakeh@users.noreply.github.com>

Co-authored-by: Šimon Brandner <simon.bra.ag@gmail.com>
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Co-authored-by: Kévin Commaille <76261501+zecakeh@users.noreply.github.com>
2 years ago
Tulir Asokan 5788b7d4e8 MSC2832: HS -> AS authorization header (#2832)
* Proposal to fix homeserver -> appservice authorization

Signed-off-by: Tulir Asokan <tulir@maunium.net>

* Remove query parameter entirely instead of deprecating it

Signed-off-by: Tulir Asokan <tulir@maunium.net>

* Update title

Co-authored-by: Jonathan de Jong <jonathandejong02@gmail.com>

Co-authored-by: Jonathan de Jong <jonathandejong02@gmail.com>
2 years ago
Bruno Windels 3a05bd637a MSC3267: Reference relations (#3267)
* initial draft of reference relations msc

* change MSC number

* Apply formatting

* Convert to point at present rather than ideal

* Clarify that multiple relations is a thing we don't have and won't fix here

* Fix wording to match reality, again

* fix a typo

Co-authored-by: Travis Ralston <travisr@matrix.org>
Co-authored-by: Andrew Morgan <andrewm@element.io>
2 years ago
Šimon Brandner 6abe71386b
MSC3786: Add a default push rule to ignore `m.room.server_acl` events (#3786)
* Add a default push rule to ignore `m.room.server_acl` events

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Update MSC number

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Add prefix `.`

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Link to spec

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Be more explicit about why the rule is needed

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Clarify push rule ordering

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Don't rely on unmerged MSCs for ordering

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Be even more explicit about why we need this

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Improve wording

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Improve wording

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Improve wording

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Add missing period

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Add spec link

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Remove `when merged`

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Remove `dont_notify`

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Check `state_key`

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago
Aaron Raimist 3ab1638b56
Upgrade typos to v1.10.2 and run on pushes to main (#3838)
Signed-off-by: Aaron Raimist <aaron@raim.ist>
2 years ago
Travis Ralston 540fb185d5
Update MSC2175 "removed auth rule" note (#3832) 2 years ago
Richard van der Hoff 6f411413af
clarification to MSC2675 (#3829)
because this is confusing enough without outright lies
2 years ago
Patrick Cloke f6f3299b0d
MSC3816: Clarify Thread Participation (#3816)
* Clarify the current_user_participated flag from MSC3440.

* Add a better link to the definition.

* Clarifications from review.

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2 years ago