Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- config/locales/en.yml
  Conflict caused by the glitch-soc-specific “flavour” string being too close
  to the newly introduced “identity_proofs” string. Just included both.

config/application.rb

@@ -41,6 +41,7 @@ module Mastodon
       :ar,
       :ast,
       :bg,
+      :bn,
       :ca,
       :co,
       :cs,
@@ -54,8 +55,10 @@ module Mastodon
       :fa,
       :fi,
       :fr,
+      :ga,
       :gl,
       :he,
+      :hi,
       :hr,
       :hu,
       :hy,