This should not change the set of words matched by `USERNAME_RE` but does
change the one matched by `MENTION_RE`. Indeed, the previous regexp allowed
a domain part to start with `.` or `-`, which the new regexp does not allow.

…mastodon#32188)

…ofile link (mastodon#32181)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

…ion.rb (mastodon#31366)

…d activities from them (mastodon#31161)

…don#32137)

…mastodon#25640)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

… from multi-page collections (mastodon#34272)

…rsService` (mastodon#34277)

…#32805)

…date (mastodon#34291)

…nts as well (mastodon#34294)

Co-authored-by: GitHub Actions <noreply@github.com>

mastodon#34337)

…ted accounts (mastodon#33617)

…astodon#34548)

… limited federation mode (mastodon#34549)

* Check scheme in account and post links

* Harden media attachments

* Client-side mitigation

* Client-side mitigation for media attachments