* 'develop' of github.com:matrix-org/synapse: (79 commits)
Reduce the number of calls to `resource.getrusage` (#7183)
Remove some `run_in_background` calls in replication code (#7203)
Revert "Revert "Merge pull request #7153 from matrix-org/babolivier/sso_whitelist_login_fallback""
Revert "Revert "Improve the UX of the login fallback when using SSO (#7152)""
Revert "Merge pull request #7153 from matrix-org/babolivier/sso_whitelist_login_fallback"
Revert "Improve the UX of the login fallback when using SSO (#7152)"
tweak changelog
1.12.3
Update docstring per review comments
Fix device list update stream ids going backward (#7158)
Fix the debian build in a better way. (#7212)
Fix changelog wording
1.12.2
Pin Pillow>=4.3.0,<7.1.0 to fix dep issue
1.12.1
review comment
1.12.1
Support SAML in the user interactive authentication workflow. (#7102)
Allow admins to create aliases when they are not in the room (#7191)
Update postgres.md (#7119)
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