* ext/socket/rsock_addrinfo (rsock_addrinfo): specify address
  family.  [Fix GH-1052]
* ext/socket/udpsocket.c (udp_connect, udp_bind, udp_send):
  address family by the receiver.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52117 b2dd03c8-39d4-4d8f-98ff-823fe69b080e