Convert the sessions local address to be a suckaddr.  This shaves
92 bytes of struct sess.
Convert the remote address of the session to suckaddr too.
Make VTCP_name() take a suckaddr.
Pull the switch and give VCL_IP a proper type.
Clean up a couple of places which assume to much about suckaddr.
OK, that was sort of embarrasing:  Allocate enough space for *both*
the two sess-> suckaddrs.
Turn suckaddr into a miniobj