avahi: enable disallow-other-stacks option by default.

This is required to make this work in kernels < 3.9 (kernel-rpi is 3.6.11 currently),
which contains support for SO_REUSEPORT.

See http://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t
for more info.

srcpkgs/avahi/template

@@ -1,7 +1,7 @@
 # Template file for 'avahi'
 pkgname=avahi
 version=0.6.31
-revision=12
+revision=13
 build_style=gnu-configure
 configure_args="--disable-qt3 --disable-qt4 --disable-mono --disable-monodoc
  --disable-doxygen-doc --enable-compat-libdns_sd --enable-compat-howl
@@ -34,6 +34,11 @@ post_extract() {
 	sed -e 's,\(avahi_runtime_dir=\).*,\1\"/run\",' -i ${wrksrc}/configure
 }
 
+post_install() {
+	# Enable 'disallow_other_stacks' option by default.
+	sed -e 's,\#\(disallow-other-stacks\).*,\1=yes,' -i ${DESTDIR}/etc/avahi/avahi-daemon.conf
+}
+
 avahi-autoipd_package() {
 	depends="net-tools"
 	short_desc="Avahi IPv4LL network address configuration daemon"