* 'develop' of github.com:matrix-org/synapse: (369 commits)
Add functions to `MultiWriterIdGen` used by events stream (#8164)
Do not allow send_nonmember_event to be called with shadow-banned users. (#8158)
Changelog fixes
1.19.1rc1
Make StreamIdGen `get_next` and `get_next_mult` async (#8161)
Wording fixes to 'name' user admin api filter (#8163)
Fix missing double-backtick in RST document
Search in columns 'name' and 'displayname' in the admin users endpoint (#7377)
Add type hints for state. (#8140)
Stop shadow-banned users from sending non-member events. (#8142)
Allow capping a room's retention policy (#8104)
Add healthcheck for default localhost 8008 port on /health endpoint. (#8147)
Fix flaky shadow-ban tests. (#8152)
Fix join ratelimiter breaking profile updates and idempotency (#8153)
Do not apply ratelimiting on joins to appservices (#8139)
Don't fail /submit_token requests on incorrect session ID if request_token_inhibit_3pid_errors is turned on (#7991)
Do not apply ratelimiting on joins to appservices (#8139)
Micro-optimisations to get_auth_chain_ids (#8132)
Allow denying or shadow banning registrations via the spam checker (#8034)
Stop shadow-banned users from sending invites. (#8095)
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