MFH: r524831 r525233 r526069

Update to 12.7.5.
Changelog:
https://about.gitlab.com/releases/2020/01/22/gitlab-12-7-released/
https://about.gitlab.com/releases/2020/01/24/gitlab-12-7-2-released/
https://about.gitlab.com/releases/2020/01/30/security-release-gitlab-12-7-4-released/
https://about.gitlab.com/releases/2020/01/31/gitlab-12-7-5-released/

Use the standard RC system available in FreeBSD.
This makes some commands like:
service gitlab rcvar
available. This is required by configuration management tools like Chef, Puppetm, Salt,
Ansible and more.

PR: 243860
Reported by: amendlik@gmail.com

Security update to 12.7.6.
Changelog:
https://about.gitlab.com/releases/2020/02/13/critical-security-release-gitlab-12-dot-7-dot-6-released/

Security: 1ece5591-4ea9-11ea-86f0-001b217b3468

Approved by: ports-secteam (joneum)