* libcsupport/include/sys/ioccom.h, libnetworking/kern/uipc_socket2.c,
libnetworking/net/ethernet.h, libnetworking/net/if.h,
libnetworking/net/if_ethersubr.c, libnetworking/net/if_ppp.c,
libnetworking/net/if_pppvar.h, libnetworking/net/ppp_tty.c,
libnetworking/net/pppcompress.c, libnetworking/net/slcompress.c,
libnetworking/netinet/in.h, libnetworking/netinet/ip_icmp.c,
libnetworking/netinet/tcp.h, libnetworking/netinet/tcp_seq.h,
libnetworking/sys/protosw.h, libnetworking/sys/socketvar.h: Remove
warnings. Most of the warnings were 16/32 bit integer sizing issues.
Some constants had L appended, some had casts add, some types were
changed to reflect a bit width requirement.
