icecast: Improve OOB experience - new defaults, add user & group ids

Signed-off-by: Ted Hess <thess@kitschensync.net>

multimedia/icecast/patches/020-icecast_config_for_openwrt.patch

@@ -0,0 +1,25 @@
+--- a/conf/icecast.xml.in
++++ b/conf/icecast.xml.in
+@@ -61,7 +61,7 @@
+          It affects mainly the urls generated by Icecast for playlists and yp
+          listings. You MUST configure it properly for YP listings to work!
+     -->
+-    <hostname>localhost</hostname>
++    <hostname>OpenWrt</hostname>
+ 
+     <!-- You may have multiple <listener> elements -->
+     <listen-socket>
+@@ -234,11 +234,9 @@
+ 
+     <security>
+         <chroot>0</chroot>
+-        <!--
+         <changeowner>
+-            <user>nobody</user>
+-            <group>nogroup</group>
++            <user>icecast</user>
++            <group>icecast</group>
+         </changeowner>
+-        -->
+     </security>
+ </icecast>