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

TCP_TTL is replaced by ip_ttl setable by sysctl

new copyright notice

default ttl 30 => 60

install approved copyright notice

much longer keepalive timer (don't start probes for 2 hr);
fix input window test again (accept acks from FINS at left edge and responses
to keepalives, but dropafterack otherwise; also fixes Phil Kar

much longer keepalive timer (don't start probes for 2 hr);
fix input window test again (accept acks from FINS at left edge and responses
to keepalives, but dropafterack otherwise; also fixes Phil Karn's problem
with failure to respond to new SYN to left of window); can't use tcp_drop
after RST, or we'll send RST in response

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use Berkeley specific header

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

add patchable tcp ttl

4.3BSD release version

longer TTL's

readjust timer values so rerouting on connection attempt
happens before timeout

define srtt to be assumed before connect; update comment

more retransmits (wait longer than routed!); close FIN_WAIT_2's
if user has closed and is inactive; fix comments

Add copyright

explicitly set srtt to 0 at start, so we know when we have
timing info

4.2 distribution

forgot to purge this stuff somehow

fixes to persist timer

bug fixes (but PERSIST still screwy)

more work on out-of-band

a number of minor changes

flip order of KEEP/PERSIST

with crud (first working version)

yet more lint