Start traditionally, stop synctl

Starting with synctl lead to "no config file found"
Stopping also leads to some (code=exited, status=1/FAILURE), but at least now we can stop the service.

contrib/systemd/synapse.service

@@ -10,8 +10,9 @@ Type=simple
 User=synapse
 Group=synapse
 WorkingDirectory=/var/lib/synapse
-ExecStart=/usr/bin/synctl start /etc/synapse/homeserver.yaml
+ExecStart=/usr/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/synapse/homeserver.yaml
 ExecStop=/usr/bin/synctl stop /etc/synapse/homeserver.yaml
 
 [Install]
 WantedBy=multi-user.target
+