Add Irker service
Created by: Aorimn
The idea is to get messages for updates in the git repository of a Project on an IRC server. Irker[1] is an IRC gateway and is the ideal as it's easy to setup on a personnal server and doesn't require an Internet connection (for private networks). In order to interface GitLab with this IRC gateway, a new service has been created. This service is derived from the email_on_push service and has therefore its own worker.