This patch will be helpful when you create upnp-igd-device that
supports windows IM client.
Sometime, Windows Messenger
client on WinXP sends 'M-SEARCH' packet to unicast-server-address
SDK can not capture this
request because he is waitng at multicast address only.
patch changes SSDP listening address from SSDP_IP to
(I do not know whether this will be allowed or not...)