(packing constraint is unknown). avoid use of u_int8_t bitfield. it is illegal.
- more length overflow check for ip6 related parsing - protocol decode fixes - add dhcp6 parser XXX how should we maintain usr.sbin/tcpdump for years to come? relationship with www.tcpdump.org codebase?
add __RCSID where necessary. make sure "make lint" does not raise fatal error (print-nfs.c)