Conflicts:
- `Gemfile.lock`:
Changes were already cherry-picked and updated further in glitch-soc.
Kept glitch-soc's version.
- `README.md`:
Upstream updated its README, we have a completely different one.
Kept glitch-soc's README.
- `app/models/account.rb`:
Not a real conflict, upstream updated some lines textually adjacent
to glitch-soc-specific lines.
Ported upstream's changes.
Conflicts:
- `config/initializers/content_security_policy.rb`:
Upstream added some code to add the Identity Provider's sign-in endpoint to
the `form-action` Content Security Policy directive but our version of the
file is pretty different.
Ported the change.