* 'release-v1.13.0' of github.com:matrix-org/synapse: (257 commits)
Update changelog based on feedback.
Move warnings in the changelog and re-iterate changes to branches.
1.13.0
update dh-virtualenv (#7526)
1.13.0rc3
Hash passwords earlier in the registration process (#7523)
1.13.0rc2
1.13.0rc2
Stop `get_joined_users` corruption from custom statuses (#7376)
Do not validate that the client dict is stable during UI Auth. (#7483)
Fix new flake8 errors (#7489)
Don't UPGRADE database rows
RST indenting
Put rollback instructions in upgrade notes
Fix changelog typo
Oh yeah, RST
Absolute URL it is then
Fix upgrade notes link
Provide summary of upgrade issues in changelog. Fix )
Move next version notes from changelog to upgrade notes
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