Fix an infinite loop in Gitlab:UntrustedRegexp

See merge request !2146

[ci skip]

Improve support for external issue references

See merge request !2137

[security-9-1] Use re2 for user-supplied regexps

See merge request !2121

[9.1 security fix] Renders 404 if given project is not readable by the user on Todos dashboard

See merge request !2120

(security-9-1) Remove the `appearance` symlink that was previously missed

See merge request !2126

Fix filename used for CHANGELOG entry

See merge request !2140

Escape the underscore char inside the LIKE operator

See merge request !2132

[ci skip]

Fix typo in moving the`appearance` folder in migrations

See merge request !2116

[ci skip]

Fix visibility when referencing snippets

See merge request !2101

Move the uploads in the correct folder when moving project/namespace

See merge request !2112

[ci skip]

Allow users autocomplete by author_id only for authenticated users

See merge request !2100

(security-9-1) Upload files into `public/upload/system` instead of `public/upload`

See merge request !2099

Restrict API X-Frame-Options to same origin

See merge request !2103

This reverts commit cc1b069f, reversing
changes made to 729c75f7.

Restrict API X-Frame-Options to same origin

See merge request !2103

(security-9-1) Upload files into `public/upload/system` instead of `public/upload`

See merge request !2099

- Move existing uploads there.
- Rename the existing `system` namespace to `system0`

[ci skip]

[ci skip]

[ci skip]

[ci skip]

Fix project tree saver and fork spec failures

Closes #31746

See merge request !11076

Fix fork_spec failure to do with mySQL

Closes #31870

See merge request !11121

Fix cross referencing for private and internal projects

Closes #31978

See merge request !11243

Fix outdated 'Admin area' link label in GitLab QA

Closes gitlab-qa#41

See merge request !10646