Add support for opening IPv6 and AF_ROUTE sockets
Add support for opening IPv6 and AF_ROUTE sockets

AF_ROUTE and IPv6 raw sockets are used by usrsctp stack.

falkevik/otp,falkevik/otp,falkevik/otp,falkevik/otp,falkevik/otp,falkevik/otp,falkevik/otp,falkevik/otp,falkevik/otp