Signed-off-by: NRémy Coutable <remy@rymai.me>

It is not possible to search for a user by his secondary email address in
the Users search bar in the admin interface(/admin/users). A use-case could
 be that an admin wants to remove a specific secondary email address of an
user, because it interferes with another user. Issue #23761

This commit adds ability to search not only by main email, but also
by any secondary email in the admin interface.

The parameter is used to search users by several criretia was
called :name. This request renames it to :search_query which closer
to it actual perpose

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

When an admin changes a user's password for them, force the user to
reset the password after logging in by expiring the new password
immediately.

Closes gitlab-org/gitlab-ee#536

`render nothing: true` has been deprecated.
For more information see [pr](https://github.com/rails/rails/pull/20336)

Fixes #13261

The user has the rights of a public user execpt it can never create a project,
 group, or team. Also it cant view internal projects.

Modifies the existing "login as" feature to be called impersonation, as
well as keeping track of who is impersonating to revert back to that
user without having to log out.

Safari 9.0 does not yet honor the HTML5 `origin-when-cross-origin` mode,
and it's possible load balancers/proxies strip the HTTP_REFERER from
the request header. In these cases, default to some default path.

Closes #3122

Closes https://github.com/gitlabhq/gitlabhq/issues/9731

Closes #2291

Closes #2116
Closes https://github.com/gitlabhq/gitlabhq/issues/9502

Closes https://github.com/gitlabhq/gitlabhq/issues/9381

Closes #1856
Closes https://github.com/gitlabhq/gitlabhq/issues/9394

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

To prevent loose of group data you need to transfer or remove group
first before you can remove user
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

Closes #1932.