miniupnpd/minissdp.c: bind the SSDP IPv6 sending socket
miniupnpd/minissdp.c: Send SSDP announces to IPv6 link-local, site-local and global multicast addresses
miniupnpd/minissdp.c: comments about binding "notify" sockets

Explain why bind() is called in functions
OpenAndConfSSDPNotifySocket and OpenAndConfSSDPNotifySocketIPV6
Merge branch 'master' into mcast_ssdp
miniupnpd/minissdp.c: fix 50e370abcd4d900ab657a3ef762a4bcec0c9aa43

while() => for() / reindent/etc
miniupnpd/minissdp.c: Add documentation to SSDPNotify* functions