u2pnpd: add new package

u²pnpd announces a device as UPnP basic device on the
network so that an user could easily find it. It tries
to detect various system information automatically, however
everything can be overridden by UCI settings.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

net/u2pnpd/files/u2pnpd.config

@@ -0,0 +1,11 @@
+config u2pnpd
+#	option interface	br-lan
+#	option use_https	no
+#	option manufacturer	'OpenWrt'
+#	option manufacturerURL	'http://www.openwrt.org/'
+#	option modelDescription	''
+#	option modelName	'Generic'
+#	option modelNumber	''
+#	option modelURL		''
+#	option serialNumber	''
+#	option uuid		''