Packet size & number of windows in UUCP

[Lee McLoughlin]

The version I support over here (UKUUCP) has the capability to change
the packet & window size when talking to itself at the remote end.  It
does this by sending across some more options in the pre-protocol messages.
It doesn't negotiate.  We've found that by playing with the numbers (they
can be set in the L.sys file) you can dramatically improve thru' put over
the X.25 networks used heavily in the UK.

	Lee.