Re-add Kerberos to AuthHelper form-based providers



See merge request !40

Invalidate stored jira password if the endpoint URL is changed

https://gitlab.com/gitlab-org/gitlab-ce/issues/2997

See merge request !38

Fix JIRA mention spec

Fixes spec that was skipped in 10de4261.

The expected behavior with commits mentioning issues, is that when the commit _closes_ the issue, the issue only gets the "closed by commit X" comment, and not also the "mentioned in commit X" comment.

With JIRA, it used to get both, and now does no longer.

The spec was updated to test the new ("correct") behavior.

See merge request !36

Fix "Rebase onto master"

https://gitlab.com/gitlab-org/gitlab-ee/issues/25

See merge request !37

Implement when syntax in .gitlab-ci.yml

See merge request !1606

[ci skip]

CE upstream

See merge request !34

Also adds a preamble note that a working 8.0 installation (i.e.,
gitlab-git-http-server, updated Nginx/Apache configs) is required before
proceeding.

[ci skip]

[ci skip]

The password is no longer presented on the form.

Add 8.1 CE-to-EE update guide

[ci skip]

See merge request !35

[ci skip]

Sentences end in periods.

[ci skip]

See merge request !1604

Prepare 8.1 documentation

[ci skip]

See merge request !1612

Update redcarpet gem. Fixes gem memory leak

Fixes #2773 

See merge request !1607

Build View UI fixes



See merge request !1608

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Markdown typography CSS fixes

The `!important` flags recently added to the `md-typography`
mixin's `pre` elements were overriding the background and
foreground colors for syntax highlighting.

| Before | After |
|:------:|:-----:|
| ![Screen_Shot_2015-09-25_at_3.32.32_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/802163bd9f46864ac89e7be165951f07/Screen_Shot_2015-09-25_at_3.32.32_PM.png) | ![Screen_Shot_2015-09-25_at_3.33.30_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/6be72036653378405320085324dff5ad/Screen_Shot_2015-09-25_at_3.33.30_PM.png) |

See merge request !1442