avahi: fix useradd race condition

Avahi doesn't work at boot because of:

+ sh /OE/../rootfs/var/lib/opkg/info/avahi-daemon.preinst
Running useradd commands...
grep: /OE/../rootfs/etc/passwd: No such file or directory

That is due to:

Package: avahi-daemon
Version: 0.6.30-r9.0
 [..]
Depends: libavahi-core7 (>= 0.6.30), libdaemon0 (>= 0.14), libcap2 (>= 2.22), libavahi-common3 (>= 0.6.30), libdbus-1-3 (>= 1.4.12), sysvinit-pidof, libc6 (>= 2.12), libexpat1 (>= 2.0.1)

After this patch:

 Package: avahi-daemon
 Version: 0.6.30-r10.0
 [..]
 Depends: libavahi-core7 (>= 0.6.30), libdaemon0 (>= 0.14), libcap2 (>= 2.22), libavahi-common3 (>= 0.6.30), libdbus-1-3 (>= 1.4.12), sysvinit-pidof, libc6 (>= 2.12), shadow, libexpat1 (>= 2.0.1), base-passwd

This also changes ${PN}-daemon to avahi-daemon to be consistent with the PACKAGES/FILES lines below

(From OE-Core rev: f01fbc17b5d9bf9a227d64fe858014376cd19432)

(From OE-Core rev: 9d0b21f0723fda0e0d287788eb79d3a70b12f949)

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/avahi/avahi.inc

@@ -14,8 +14,7 @@ SECTION = "network"
 # python scripts are under GPLv2+
 LICENSE = "GPLv2+ & LGPLv2.1+"
 
-INC_PR = "r8"
-
+INC_PR = "r9"
 DEPENDS = "expat libcap libdaemon dbus glib-2.0"
 
 SRC_URI = "http://avahi.org/download/avahi-${PV}.tar.gz \
@@ -23,8 +22,9 @@ SRC_URI = "http://avahi.org/download/avahi-${PV}.tar.gz \
           file://99avahi-autoipd \
           file://initscript.patch"
 
-USERADD_PACKAGES = "${PN}-daemon"
-USERADD_PARAM_${PN}-daemon = "--system --home /var/run/avahi-daemon \
+USERADDPN = "avahi-daemon"
+USERADD_PACKAGES = "avahi-daemon"
+USERADD_PARAM_avahi-daemon = "--system --home /var/run/avahi-daemon \
                               --no-create-home --shell /bin/false \
                               --user-group avahi"