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

fix suggested by Jim Mostek & Tim Kirby against mbuf leek on explicitly
retrieving Xtpdu's

trailing comment after #else or #endif

make kernel includes standard

bugfix from julian@tfs.com (Julian Elischer)

changes required by nov 92 version of socketvar.h

mtu calculation done by tp_route_to.

paranoia about freeing a tpcb while still in the list of bound tcb's
or list of children of a given TSEL

move packetizing routine to tp_subr.c

fix outright bug disrupting chain of bound tpcb's -- PRU_DETACH
may happen twice; combine intercepts and normal listeners into single chain.

checkpoint almost working version of kernel TP0/X.25; TP4/Cons seems
to crash system still.

note semi working version with only listen and bind changes

this changes reflect getting rid of so_tpcb.

minor changes to compile under both new and old vm systems

new copyright; att/bsd/shared

allow implict confirmation by sending data after accept()

fix from mostek@cray

fix minor bugs in setting up cross-list of listeners, intercepters, and their descendents

check for duplicate CR's; allow intercepting all CR's to a given
nsap; not yet tested, but check in for tape anyhow

conform to UC kernel conventions concerning if(, function calls, etc.

tp_control_hdr obsoleted by cmsghdr in socket.h

new conventions for who frees ancillary data

access rights made special case of ancillary data

more fixes to silly window fix this version 6 dec 89.

silly window fix causes panics; fix ``fix''