Merge branch 'increase-nginx-push-size' into 'master'

Increase Nginx Push Size

CHANGELOG

 v 6.7.0
+  - Increased the example Nginx client_max_body_size from 5MB to 20MB, consider updating it manually on existing installations
   - Add support for Gemnasium as a Project Service (Olivier Gonzalez)
   - Add edit file button to MergeRequest diff
   - Public groups (Jason Hollingsworth)

lib/support/nginx/gitlab

@@ -27,7 +27,7 @@ server {
   
   # Increase this if you want to upload large attachments
   # Or if you want to accept large git objects over http
-  client_max_body_size 5m;
+  client_max_body_size 20m;
 
   # individual nginx logs for this gitlab vhost
   access_log  /var/log/nginx/gitlab_access.log;