Gitlab-workhorse related 8.3 update changes

doc/update/8.2-to-8.3.md

@@ -78,7 +78,7 @@ which should already be on your system from GitLab 8.1.
 ```bash
 cd /home/git/gitlab-workhorse
 sudo -u git -H git fetch --all
-sudo -u git -H git checkout 0.4.2
+sudo -u git -H git checkout 0.5.0
 sudo -u git -H make
 ```
 
@@ -115,6 +115,12 @@ git diff origin/8-2-stable:config/gitlab.yml.example origin/8-3-stable:config/gi
 
 #### Nginx configuration
 
+GitLab 8.3 introduces major changes in the NGINX configuration.
+Because all HTTP requests pass through gitlab-workhorse now a lot of
+directives need to be removed from NGINX. During future upgrades there
+should be much less changes in the NGINX configuration because of
+this.
+
 View changes between the previous recommended Nginx configuration and the
 current one:
 
@@ -134,6 +140,18 @@ via [/etc/default/gitlab].
 [Apache templates]: https://gitlab.com/gitlab-org/gitlab-recipes/tree/master/web-server/apache
 [/etc/default/gitlab]: https://gitlab.com/gitlab-org/gitlab-ce/blob/8-3-stable/lib/support/init.d/gitlab.default.example#L34
 
+#### Init script
+
+We updated the init script for GitLab in order to pass new
+configuration options to gitlab-workhorse. We let gitlab-workhorse
+connect to the Rails application via a Unix domain socket and we tell
+it where the 'public' directory of GitLab is.
+
+```
+cd /home/git/gitlab
+sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
+```
+
 ### 8. Use Redis v2.8.0+
 
 Previous versions of GitLab allowed Redis versions >= 2.0 to be used, but