upmpdcli: Add UPnP icon. Use procd for start/stop. 

Add uci config support for multiple instances

Signed-off-by: Ted Hess <thess@kitschensync.net>
It looks like libupnpp does a pretty good job of drilling down to the interface IP address from whatever you pass to it. I was using 'br-lan' as an example here since it usually spans one or more ehternet device (eth0, eth1.1, etc) and 1 or more wireless devices. In these cases, the procedure 'getsyshwaddr will find the appropriate IP address to bind to. If more finer grained control is needed, the IP address needs to be specified in the config file via the upnpip var and don't specify an interace on the command-line.

Since this file is only an example, we should leave it as it is?