Include Merge description message in merge by default. User can disable description in merge message by clicking on `Don't include description in commit message`.

Drop the merge title which is "Merge branch SOURCE into TARGET" and only keep the MR title as commit message.

From gitlab 8.12 there is new CI job permissions model which only accept login
from ci token for running job. Then the access is revoked after the job is finished.
In Nexedi, when have a lot of URLs which rely on gitlab-ci-token and project-runners-token, so
we need to re-allow access else access to all those URL will be refused.

More info are here: https://docs.gitlab.com/ee/user/project/new_ci_build_permissions_model.html#before-gitlab-8-12

TODO detect whether request comes from China and only then show ICP (?).

We show in small font size the same info that is shown on sign_in page:

    "GitLab Nexedi Edition", "About GitLab" and "About Nexedi"

This is good to have and hereby-introduced about-footer area will be
also used in the next patch for ICP too.

XXX placement of .about-footer to be near bottom is done not very
correctly.

Both fetch and push are possible over https, which is selected by http if
gitlab was configured to use https in external url.

This way to reduce security vectors and possible ways to interact with gitlab
we use https only without ssh at all.

= GitLab Community Edition + Nexedi patches

[ci skip]

[ci skip]

[ci skip]

[ci skip]

[ci skip]

[ci skip]

The last commit synced to this repository includes the "ci skip" tag,
preventing tag pipelines from running. To ensure these pipelines do run,
we create this commit. This normally is only necessary if a Merge Train
sync didn't introduce any new changes.

For more information, refer to issue
https://gitlab.com/gitlab-com/gl-infra/delivery/-/issues/1355.

[ci skip]

The last commit synced to this repository includes the "ci skip" tag,
preventing tag pipelines from running. To ensure these pipelines do run,
we create this commit. This normally is only necessary if a Merge Train
sync didn't introduce any new changes.

For more information, refer to issue
https://gitlab.com/gitlab-com/gl-infra/delivery/-/issues/1355.

[ci skip]