#50 Silly Window Problem

[William Mills]

We suffer from the Silly Window Problem.... This needs
to be resolved in CBEEP.c.

I have started messing with it and believe I have both
areas identified for fixes. One is in best seq to send
and the other is in bll_out_buffer. Proposed quick
fixes are:

1) Best seq to send will not send a SEQ unless it's
opening the window by at least half.

2) bll_out_buffer will always send a frame that can be
completely sent in the window, but won't fragment a
frame unless it can send at least 1/4 of the full
window size.