redo retransmit calculations as srtt + 2*smoothed variance
(from Van Jacobson)

slow-start changes from van

patchable tcp ttl

hack keepalives for now (for Ultrix, at least)

new stats; change keepalives to use rcv_nxt instead of rcv_nxt-1
with no data (so we won't ignore the resets)

wake up sleepers when error is detected

4.3BSD release version

yaml (yet another mbuf leak)

ctlinput now takes pointers to sockaddrs; don't close on all errors

Add copyright

remove ip_ctlinput, do all the work in higher level ctlinput's

add snd_cwndw to decrease outstanding data after a source quench

initialize t_srtt; use TCP_MSS define for default maxseg

Include file changes. No more ../h

4.2 distribution

free queued segments carefully, runs at splnet, not splimp

remove /usr/include dependencies

stuff from bill to insure no references are kept to free'd cb's

clean some stuff up and purge some crud

fix default max seg size problem

typed mbufs

merge 4.1b with 4.1c

get rid of conditional htons/ntohs etc

lint

lint