generic userid: use the new USERID api

recent changes in trunk allow us to specify the userid inside the openwrt makefile.
the info is stored int he meta data of the IPK contorl file and users are generated
by the new generic postinst trigger.

Signed-off-by: John Crispin <blogic@openwrt.org>

net/dmapd/Makefile

@@ -32,6 +32,7 @@ define Package/dmapd
   DEPENDS:=+libdmapsharing +libdb47 +vips
   TITLE:= dmapd
   URL:=http://www.flyn.org/projects/dmapd/
+  USERID:=dmapd=56:dmapd=56
 endef
 
 define Package/dmapd/decription

net/dmapd/files/dmapd.init

@@ -4,8 +4,6 @@
 START=60
 
 start() {
-	user_exists dmapd 56 || user_add dmapd 56
-	group_exists dmapd 56 || group_add dmapd 56
 	[ -d /var/run/dmapd ] || {
 		mkdir -m 0755 -p /var/run/dmapd
 		chown dmapd:dmapd /var/run/dmapd