gitlab: Upgrade to 8.5 + ...
- GitLab Software + patches ported to latest stable GitLab 8.5.1 (including fix for raw downloading to work in browser for private repositories);
- Sync-with-upstream procedure streamlined (now only 1 branch for tracking upstream configuration files);
- Base software upgraded: Ruby, Redis, Nginx, Git;
- misc fixes.
Demo instance: https://softinst62804.host.vifib.net