GitLab becomes unhappy if it can't poll localhost.

Kristian Klausen authored 4 years ago and Sven-Hendrik Haase committed 4 years ago

Fix #228

Gitlab uses IMAP to fetch incoming mails. IMAP used to run on port 143
until the recent migration which disabled that port. This change makes
gitlab use port 993 and implicit TLS.

This cuts some complexity while also getting rid of the Docker userspace proxy which is slow compared
to kernelspace routing.
It also allows us to make GitLab consume a second IP for GitLab Pages without too much fuckery.

The idea is to make sure people don't blindly add cleanup tasks.

See https://docs.ansible.com/ansible/devel/porting_guides/porting_guide_2.10.html#id3

Use Gitlab's official backup tool for dumping the database, git
repositories and other data with a wrapper script similiar to the
postgres and mysql backup scripts.

Signed-off-by: Jelle van der Waa <jelle@archlinux.org>