Changes in synapse v0.24.0-rc1 (2017-10-19)

===========================================

Features:

* Add Group Server (PR #2352, #2363, #2374, #2377, #2378, #2382, #2410,
  #2426, #2430, #2454, #2471, #2472, #2544)
* Add support for channel notifications (PR #2501)
* Add basic implementation of backup media store (PR #2538)
* Add config option to auto-join new users to rooms (PR #2545)

Changes:

* Make the spam checker a module (PR #2474)
* Delete expired url cache data (PR #2478)
* Ignore incoming events for rooms that we have left (PR #2490)
* Allow spam checker to reject invites too (PR #2492)
* Add room creation checks to spam checker (PR #2495)
* Spam checking: add the invitee to user_may_invite (PR #2502)
* Process events from federation for different rooms in parallel (PR
  #2520)
* Allow error strings from spam checker (PR #2531)
* Improve error handling for missing files in config (PR #2551)

Bug fixes:

* Fix handling SERVFAILs when doing AAAA lookups for federation (PR
  #2477)
* Fix incompatibility with newer versions of ujson (PR #2483) Thanks to
  @jeremycline!
* Fix notification keywords that start/end with non-word chars (PR
  #2500)
* Fix stack overflow and logcontexts from linearizer (PR #2532)
* Fix 500 error when fields missing from power_levels event (PR #2552)
* Fix 500 error when we get an error handling a PDU (PR #2553)
-----BEGIN PGP SIGNATURE-----

iQItBAABCAAXBQJZ6MdvEBxlcmlrQG1hdHJpeC5vcmcACgkQOtoG7cdT0R52URAA
rTBnFmSo9GtGImfNywEA3QBM2TTjST4/bVBOeTqHOax7oecbkIkJil0JiFSiUTH2
5mfs9gm+1joFnjxCzzKMmpS4YBMoUiUsAM8sjeK+i2k9GbZ70EAWOBVB7XsphlO4
dPTvXF6QwwkGnTpj71E0BVMapiL79pj4G6DcDvf71guD0cZzn9q3tfrHfJj1OZgh
MdGtL7G75e+bt10bAS09et03S1V0YoVQYWScjGBMhtUG0JDl1NarKGyH/yUKz5X1
htRrAbpKcI9fWeQWnvHRU5piqe5kgv3FtEcnkY7md0p/0HBQaSjffRcmiZL9SYag
sSQZfKWwdjXv0K4iuzQ3SFQfBBW0M2TAcgzxs2rhyraKjllL5JelvrcJ5xkHAfiC
Pm6iIhSge31zO0gMYF0ft/hOmhiXPUdLHqlw22b1zxVC+cLJZwTz9jwrjAUs1xc9
AbINN2tzSE0lE9h2sxqvjocsb9LaTV83JbF3WEF8mQOCovBjhJD/u5vmqlg+Nr+s
ovhu9BcEHL9imu64gP2XJH/HipxV7PLI/3rQKedpLSL4A7kYalwMacMyw4Yj9l43
/q6yiWnwTtrlngT/5qaiPQys02sIh7mgnzR37f3Gs8bbVvZYRtaK9HfzhrsnFwJN
W/gtC99azU77GCgxdPeKXJjROuRnXl+YREP+1JGuKhw=
=gv+r
-----END PGP SIGNATURE-----