[aprssig] Fill-in Digis

[scott at opentrac.org]

> Hummh, I assumed additional packets would be
> added frames in the same packet.  But that is a good
> question for a true DCD instead of noise squelch.,
> Bob

There's no guarantee that it'll be a single FLAG between frames.  It could
be two, or it could be several.  I guess as long as the difference between
devices in what constutites the end of a transmission is not more than the
length of the packet, you'll still get a collision.

Scott
N1VG