GitLab: Gather GitLab specific environment information.

System information
System:         Debian 8.10
Current User:   git
Using RVM:      no
Ruby Version:   2.3.6p384
Gem Version:    2.6.13
Bundler Version:1.13.7
Rake Version:   12.3.0
Redis Version:  3.2.11
Git Version:    2.14.3
Sidekiq Version:5.0.5
Go Version:     unknown

GitLab information
Version:        10.4.3
Revision:       183dd5d
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     postgresql
URL:            http://gitlab.blackfirefly.de
HTTP Clone URL: http://gitlab.blackfirefly.de/some-group/some-project.git
SSH Clone URL:  git@gitlab.blackfirefly.de:some-group/some-project.git
Using LDAP:     no
Using Omniauth: no

GitLab Shell
Version:        5.11.0
Repository storage paths:
- default:      /var/opt/gitlab/git-data/repositories
Hooks:          /opt/gitlab/embedded/service/gitlab-shell/hooks
Git:            /opt/gitlab/embedded/bin/git