Personal server-side keyword muting

Re-draft button (delete status and fill out compose form)

Validate MX record of e-mail field on sign-up, check against blacklist to help with spam

Automatically fix accounts that got accidentally duplicated because of faulty uniqueness constraint

Fix repeated account UPDATEs during account removal process which negatively affects performance

Optimize mastodon:media:remove_remote to use concurrency

Optimize mastodon:feeds:build to use concurrency