* fix: Crippled diff (#4726)

* Regenerate css

- Move Screenshots to Bottom

in browser saw `/repos/{owner}/{repo}/branches/{branch} List a repository's branches` fixed

Addresses https://github.com/go-gitea/debian-packaging/pull/1

Fixes https://github.com/go-gitea/gitea#4892

This change makes it easier to customize the header and footer content. Before this change, the whole header and footer had to be overridden, including the meta, style and script tags.

Signed-off-by: Lukas Bestle <mail@lukasbestle.com>

* Fix redirect with non-ascii branch names (#4764)

* Add integration tests for non-ascii branch redirect

* Fix mysql test and coverage test

GitLab CE doesn't support multiple assignees for issues.  
That's an enterprise feature.  See: https://docs.gitlab.com/ee/user/project/issues/multiple_assignees_for_issues.html

Signed-off-by: Nicolas Lenz <nicolas@eisfunke.com>

The feature to list commits from a subdirectory is already there but
so far the history link to it was missing. There is a History button
in the view_file.tmpl already so avoid showing two history buttons in
that case.

The GitHub webinterface has the same History button in the same place
so this makes gitea a little bit more compatible.

Signed-off-by: Bernhard Froehlich <decke@bluelife.at>

* Minor fix to TRANSLATORS

Replaced @ with AT and removed " accidentially put in few lines

* Update TRANSLATORS

* Make reverse proxy auth optional

If the option ENABLE_REVERSE_PROXY_AUTHENTICATION is enabled, make
reverse proxy auth optional, instead of failing if the authentication
did not succeed.

Fixes #3973

Signed-off-by: Najib Idrissi <najib.idrissi.kaitouni@gmail.com>

* Update http.go

As we've dropped support for go 1.8 (see 1.5.0 release post),
now we need to ensure that a minimum of go 1.9 builds correctly.

* Update "Upgrade from Gogs" en-us doc

- Move "Change gogs specific information" FROM/TO steps up
  to just beneath matching section header, adjust indention
  and explicitly specify syntax of code sample to provide
  highlighting

- Adjust header levels to match what appears to be the
  intended level, remove trailing decoration (see below)

- Move "Upgrading to most recent ..." section down, remove
  decoration (section header formatting likely covers this
  well enough already)

refs go-gitea/gitea#4286, go-gitea/gitea#3558

* Update "Upgrade from Gogs" fr-fr doc

- Adjust indention and explicitly specify syntax of code
  sample to provide highlighting

- Adjust header levels to match what appears to be the
  intended level, remove trailing decoration since
  section header formatting likely covers this
  well enough already

refs go-gitea/gitea#4286, go-gitea/gitea#3558

* Make sure to reset commit count in the cache on mirror syncing

* reset count of commits in all branches

* Make sure author cannot reject/approve their own PR

* Disable buttons in templates too

* Remove unneccessary if check since the switch below catches it

* Fix IsOwner check

* Update template and remove new template variable

* Add alert template and redirect to diff page on review failure

* Redirect to files diff as a little update to #4632