Allow socket activation

PartOf deactivates the socket whenever the service get deactivated. The socket unit however should be active nevertheless.

Signed-off-by: Max Harmathy <max.harmathy@web.de>

contrib/init/systemd/docker.socket

@@ -1,6 +1,5 @@
 [Unit]
 Description=Docker Socket for the API
-PartOf=docker.service
 
 [Socket]
 ListenStream=/var/run/docker.sock