Merge branch 'master' into 'master'

Update config.yml.example

See merge request !597

config/gitlab.yml.example

@@ -12,6 +12,9 @@
 # 2. Update gitlab -> host with your fully qualified domain name
 # 3. Update gitlab -> email_from
 # 4. If you installed Git from source, change git -> bin_path to /usr/local/bin/git
+     IMPORTANT: If Git was installed in a different location use that instead.
+     You can check with `which git`. If a wrong path of Git is specified, it will 
+     result in various issues such as failures of GitLab CI builds.
 # 5. Review this configuration file for other settings you may want to adjust
 production: &base