* Don't use GCC union assignment feature (.rrs=0 => .rrs.untyped=0).
* Explictly cast things to [const] struct sockaddr* in syscall args.
* Check whether we need -lsocket.
* Don't use GCC union assignment feature (.rrs=0 => .rrs.untyped=0).
* Explictly cast things to [const] struct sockaddr* in syscall args.
* Check whether we need -lsocket.