clean up docker init

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

alpine/packages/docker/etc/init.d/docker

@@ -1,11 +1,17 @@
 #!/sbin/openrc-run
 
+depend()
+{
+	after 9pudc transfused
+	before chronyd
+}
+
+start()
+{
 	export DOCKER_RAMDISK="true"
 
 	command="${DOCKER_BINARY:-/usr/bin/docker}"
 
-pidfile="/run/docker.pid"
-
 	# Start with networking on both Mac and Hyper-V, but in
 	# future change this to use a hypervisor socket.
 	DOCKER_OPTS="${DOCKER_OPTS} -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock"
@@ -26,19 +32,22 @@ command_args="daemon -p \"${pidfile}\" ${DOCKER_OPTS}"
 
 	DOCKER_LOGFILE="/var/log/docker.log"
 
-start_stop_daemon_args="--background \
-        --stderr \"${DOCKER_LOGFILE}\" --stdout \"${DOCKER_LOGFILE}\""
+	pidfile="/run/docker.pid"
 
-depend()
-{
-        after 9pudc transfused
-        before chronyd
+	start-stop-daemon --start --quiet \
+		--background \
+		--exec ${command} \
+		--pidfile ${pidfile} \
+		--stderr "${DOCKER_LOGFILE}" \
+		--stdout "${DOCKER_LOGFILE}" \
+		-- ${command_args}
 }
 
 stop()
 {
 	# stop docker
 	einfo "Stopping docker"
+	pidfile="/run/docker.pid"
 	start-stop-daemon --stop --quiet --pidfile ${pidfile}
 
 	# taken from localmount stop script