Having two states that essentially mean the same thing is very much like
having a boolean "true" and boolean "mostly-true": it's rather silly.
This commit merges the "reopened" state into the "opened" state while
taking care of system notes still showing messages along the lines of
"Alice reopened this issue".

A big benefit from having only two states (opened and closed) is that
indexing and querying becomes simpler and more performant. For example,
to get all the opened queries we no longer have to query both states:

    SELECT *
    FROM issues
    WHERE project_id = 2
    AND state IN ('opened', 'reopened');

Instead we can query a single state directly, which can be much faster:

    SELECT *
    FROM issues
    WHERE project_id = 2
    AND state = 'opened';

Further, only having two states makes indexing easier as we will only
ever filter (and thus scan an index) using a single value. Partial
indexes could help but aren't supported on MySQL, complicating the
development process and not being helpful for MySQL.

[EE] Use `:empty_project` where possible in feature specs

See merge request !2546

Add license check before enabling extra features for LDAP

Closes #2844

See merge request !2513

CE upstream - Wednesday

Closes omnibus-gitlab#2612

See merge request !2527

Fix header levels of auto deploy quick start

See merge request !2545

Present Related Issues widget for logged-out users when publicly available

Closes #3004

See merge request !2525

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

[EE] Incorporate RefsService.FindAllBranches Gitaly RPC

See merge request !2521

information on language support for i18n

See merge request !2530

EE-Port: Add all ApplicationSettings attributes to the API

Closes gitlab-ce#34163

See merge request !2431

(It wasn't possible.)

[EE] Skip OAuth authorization for trusted applications

See merge request !2456

Fix ordering in Gemfile.lock

See merge request !2541

The following LDAP features will be disabled without a license key:

* Syncing of users
* Syncing of all kind of groups
* Linked LDAP groups configuration
* Support for multiple LDAP servers

Merge branch '2992-add-feature-set-description-to-pcf-tile-installation-documentation' into 'master'

Add feature set description to PCF tile installation documentation

See merge request !2498

[EE] Remove superfluous tags in RSpec examples.

See merge request !2396