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

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

Closes #1798

delay is in seconds
more legible code in session_store
Added `GitLab restart required` help block to session_expire_delay

settings

Closes https://github.com/gitlabhq/gitlabhq/issues/6745

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

This feature was requested long ago:

http://feedback.gitlab.com/forums/176466-general/suggestions/4118466-ability-to-register-only-from-ceratain-domains

This MR is based off !253 but changed to use application settings and use wildcard strings
to give more flexibility in pattern matching. Regexps seemed overkill and easy to get wrong.

Only restrict e-mail addresses upon creation

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

Upon tagging a repository, an error due to a missing migration occurred:

```
    PG::Error: ERROR:  column "taggings_count" does not exist
        LINE 1: UPDATE "tags" SET "taggings_count" = COALESCE("taggings_coun...
```

Ran `rake acts_as_taggable_on_engine:install:migrations`, removed the first
migration that created the `tags` and `taggings` table, and added the rest.

Closes #1512
Closes https://github.com/gitlabhq/gitlabhq/issues/6867
Closes https://github.com/gitlabhq/gitlabhq/issues/9194

Add new global application settings for default project and snippet
visibility levels.

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

This commit allows user to show one of their emails in profile page,
or don't show email in this page.

Fix bug where error messages from Dropzone would not be displayed on the issues page

Closes #1258

Add checkboxes to the application settings page for restricted
visibility levels, and remove those settings from gitlab.yml.