gitea: Update to 1.12.6.

Fixes pkgsrc handling of the frontend artefacts, various files were previously
missing, leading to errors in the web interface.

Changes since 1.12.1:

## [1.12.6](https://github.com/go-gitea/gitea/releases/tag/v1.12.6) - 2020-11-11

* SECURITY
  * Prevent git operations for inactive users (#13527) (#13537)
  * Disallow urlencoded new lines in git protocol paths if there is a port (#13521) (#13525)
* BUGFIXES
  * API should only return Json (#13511) (#13564)
  * Fix before and since query arguments at API (#13559) (#13560)
  * Prevent panic on git blame by limiting lines to 4096 bytes at most (#13470) (#13492)
  * Fix link detection in repository description with tailing '_' (#13407) (#13408)
  * Remove obsolete change of email on profile page (#13341) (#13348)
  * Fix permission check on get Reactions API endpoints (#13344) (#13346)
  * Add migrated pulls to pull request task queue (#13331) (#13335)
  * API deny wrong pull creation options (#13308) (#13327)
  * Fix initial commit page & binary munching problem (#13249) (#13259)
  * Fix diff parsing (#13157) (#13136) (#13139)
  * Return error 404 not 500 from API if team does not exist (#13118) (#13119)
  * Prohibit automatic downgrades (#13108) (#13111)
  * Fix GitLab Migration Option AuthToken (#13101)
  * GitLab Label Color Normalizer (#12793) (#13100)
  * Log the underlying panic in runMigrateTask (#13096) (#13098)
  * Fix attachments list in edit comment (#13036) (#13097)
  * Fix deadlock when deleting team user (#13093)
  * Fix error create comment on outdated file (#13041) (#13042)
  * Fix repository create/delete event webhooks (#13008) (#13027)
  * Fix internal server error on README in submodule (#13006) (#13016)

## [1.12.5](https://github.com/go-gitea/gitea/releases/tag/v1.12.5) - 2020-10-01

* BUGFIXES
  * Allow U2F with default settings for gitea in subpath (#12990) (#13001)
  * Prevent empty div when editing comment (#12404) (#12991)
  * On mirror update also update address in DB (#12964) (#12967)
  * Allow extended config on cron settings (#12939) (#12943)
  * Open transaction when adding Avatar email-hash pairs to the DB (#12577) (#12940)
  * Fix internal server error from ListUserOrgs API (#12910) (#12915)
  * Update only the repository columns that need updating (#12900) (#12912)
  * Fix panic when adding long comment (#12892) (#12894)
  * Add size limit for content of comment on action ui (#12881) (#12890)
  * Convert User expose ID each time (#12855) (#12883)
  * Support slashes in release tags (#12864) (#12882)
  * Add missing information to CreateRepo API endpoint (#12848) (#12867)
  * On Migration respect old DefaultBranch (#12843) (#12858)
  * Fix notifications page links (#12838) (#12853)
  * Stop cloning unnecessarily on PR update (#12839) (#12852)
  * Escape more things that are passed through str2html (#12622) (#12850)
  * Remove double escape on labels addition in comments (#12809) (#12810)
  * Fix "only mail on mention" bug (#12775) (#12789)
  * Fix yet another bug with diff file names (#12771) (#12776)
  * RepoInit Respect AlternateDefaultBranch (#12746) (#12751)
  * Fix Avatar Resize (resize algo NearestNeighbor -> Bilinear) (#12745) (#12750)
* ENHANCEMENTS
  * gitea dump: include version & Check InstallLock (#12760) (#12762)

## [1.12.4](https://github.com/go-gitea/gitea/releases/tag/v1.12.4) - 2020-09-02

* SECURITY
  * Escape provider name in oauth2 provider redirect (#12648) (#12650)
  * Escape Email on password reset page (#12610) (#12612)
  * When reading expired sessions - expire them (#12686) (#12690)
* ENHANCEMENTS
  * StaticRootPath configurable at compile time (#12371) (#12652)
* BUGFIXES
  * Fix to show an issue that is related to a deleted issue (#12651) (#12692)
  * Expire time acknowledged for cache (#12605) (#12611)
  * Fix diff path unquoting (#12554) (#12575)
  * Improve HTML escaping helper (#12562)
  * models: break out of loop (#12386) (#12561)
  * Default empty merger list to those with write permissions (#12535) (#12560)
  * Skip SSPI authentication attempts for /api/internal (#12556) (#12559)
  * Prevent NPE on commenting on lines with invalidated comments (#12549) (#12550)
  * Remove hardcoded ES indexername (#12521) (#12526)
  * Fix bug preventing transfer to private organization (#12497) (#12501)
  * Keys should not verify revoked email addresses (#12486) (#12495)
  * Do not add prefix on http/https submodule links (#12477) (#12479)
  * Fix ignored login on compare (#12476) (#12478)
  * Fix incorrect error logging in Stats indexer and OAuth2 (#12387) (#12422)
  * Upgrade google/go-github to v32.1.0 (#12361) (#12390)
  * Render emoji's of Commit message on feed-page (#12373)
  * Fix handling of diff on unrelated branches when Git 2.28 used (#12370)

## [1.12.3](https://github.com/go-gitea/gitea/releases/tag/v1.12.3) - 2020-07-28

* BUGFIXES
  * Don't change creation date when updating Release (#12343) (#12351)
  * Show 404 page when release not found (#12328) (#12332)
  * Fix emoji detection in certain cases (#12320) (#12327)
  * Reduce emoji size (#12317) (#12327)
  * Fix double-indirection bug in logging IDs (#12294) (#12308)
  * Link to pull list page on sidebar when view pr (#12256) (#12263)
  * Extend Notifications API and return pinned notifications by default (#12164) (#12232)

## [1.12.2](https://github.com/go-gitea/gitea/releases/tag/v1.12.2) - 2020-07-11

* BUGFIXES
  * When deleting repository decrese user repository count in cache (#11954) (#12188)
  * Return full commit message instead of summary in commits API (#12186) (#12187)
  * Properly set HEAD when a repo is created with a default branch that is not named 'master' (#12135) (#12182)
  * Ensure GPG Subkeys are verified (#12155) (#12168)
  * Fix failing to cache last commit with key being to long (#12151) (#12161)
  * Multiple small admin dashboard fixes (#12153) (#12156)
  * Remove spurious logging of " Delete all repository archives" at startup (#12139) (#12148)
  * Fix repository setup instructions when default branch is not named 'master' (#12122) (#12147)
  * Move EventSource to SharedWorker (#12095) (#12130)
  * Fix ui bug in wiki commit page (#12089) (#12125)
  * Fix gitgraph branch continues after merge (#12044) (#12105)
  * Set the base url when migrating from Gitlab using access token or username without password (#11852) (#12104)
  * Ensure BlameReaders close at end of request (#12102) (#12103)
  * Fix panic when adding review comment (#12058)
* ENHANCEMENTS
  * Disable dropzone's timeout for file uploads (#12024) (#12032)

(jperkin)