notifications when we register an address...

make it so we send our responses on our own ip, and not the
multicast, along with turning off multicast loopback so we
don't see our own traffic...

Move the registering the SSDP services after the start of the
http server since we now send out notifications...

[git-p4: depot-paths = "//depot/": change = 718]

from: http://frungy.org/~tpot/weblog/2006/01/19#python-upnp-abandoned

[git-p4: depot-paths = "//depot/": change = 717]