matrix: Update turnserver config

- Drop the custom service file, use the packaged one
- Merge in the comments from the packaged config file

roles/matrix/files/turnserver.service

-[Unit]
-Description=STUN and TURN relay server for VoIP and WebRTC
-After=network.target
-
-[Service]
-Type=forking
-ExecStart=/usr/bin/turnserver -o -v -c /etc/turnserver/turnserver.conf --pidfile /run/turnserver/turnserver.pid
-PIDFile=/run/turnserver/turnserver.pid
-RuntimeDirectory=turnserver
-RuntimeDirectoryMode=0700
-LogsDirectory=turnserver
-
-[Install]
-WantedBy=multi-user.target

roles/matrix/tasks/main.yml

@@ -292,13 +292,6 @@
   notify:
     - restart matrix-appservice-irc
 
-- name: install turnserver units
-  copy: src={{ item }} dest=/etc/systemd/system/{{ item }} owner=root group=root mode=0644
-  with_items:
-    - turnserver.service
-  notify:
-    - restart turnserver
-
 - name: enable synapse units
   service: name={{ item }} enabled=yes
   with_items: