update changelog

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

Password can now be specified at the same time as the new URL, and the service
template admin pages now work.

This reverts commit b4639754.

It now allows to specify a password at the same time as the new URL, and works
on the service template admin pages.

Issue gitlab-com/support-forum#213

Closes #1713
Closes #1714
Closes gitlab-com/support-forum#139

When notify is set to true send messages will trigger a notification for
all room members.
Color changes the background color of the message.

Consolidate allowed parameters in one place to avoid these kinds of bugs in the future.

Closes https://github.com/gitlabhq/gitlabhq/issues/9181

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

Supports four different event types all bundled under the "note" event type:

- comments on a commit
- comments on an issue
- comments on a merge request
- comments on a code snippet

1) Adds a DB migration for all services to toggle on push, issue, and merge events.

2) Upon an issue or merge request event, fire service hooks.

3) Slack service supports custom messages for each of these events. Other services
not supported at the moment.

4) Label merge request hooks with their corresponding actions.

Irker is a gateway which sends IRC messages on git updates. This new
service provides an interface to this gateway, integrated in Gitlab, for
each updates.
As per the guidelines, this commit adds the new feature in the
CHANGELOG, tests and documentation.

See http://www.catb.org/esr/irker/

See #1950