non-linux: Apply RFC3542 obsoletion of RFC2292 macros

(IPV6_RECVHOPLIMIT, IPV6_HOPLIMIT, IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
IPV6_RTHDRDSTOPTS, IPV6_RECVRTHDR, IPV6_RTHDR, IPV6_RECVDSTOPTS,
IPV6_DSTOPTS, IPV6_RECVPATHMTU, IPV6_PATHMTU, IPV6_DONTFRAG):
New macros.