document slightly closer to working code to send to mitre

fixes from jch

document non-working version sent to mitre

this one actually compiles . . .

compromise fixes for duped keys

compromise fixes re: Richard Woundy; moves knowledge of dupedkey-chains
and finding a match relative to a key **and** a mask to an AF-specific routine.

lint

af.h has been retired

4.4BSD snapshot (revision 8.1); add 1993 to copyright

prototype everything

fix two bugs: rn_lookup did not change conventions (still takes node);
found cause of ifa_refcnt being wrong on route change.

new conventions for using routing tree

almost never needed m_pullup to insure at least 4 bytes in first
mbuf causes double allocation of mbufs, causing grief in busy routers.
(From Heimlich@IBM via jch)

need type consistency for sysctl (by sklower)

when doing a RTM_GET you can have different sockaddrs returned
than what you started with.

convert kinfo_rtable to sysctl_rtable

make kernel includes standard

need to include "systm.h"

changes to add routing tables via the domain switch

set ifa_flags in NEWADDR message

fix uninitialized variable (dst) if senderr called in route_output().

make it possible to change routes with duped keys, when
exactly matching netmasks are provided

yet another oversight (need to mask off af bits from op)

new kerninfo for surveying interface list; new conventions for
rt_missmsg; new routing messages for interface added, deleted, state change

checked in for torek by sklower; Mike agrees to all these changes