[ax25-layer2] 7-byte address proposal

[scott at opentrac.org]

> It seems to me that APRS is a poor adaptation of AX25.

There's method in its madness.  All of those kludges are there for a reason
- not always a good reason, but a reason nonetheless.  I disagree with a lot
of Bob's decisions in the APRS spec, but I understand why it is what it is.

> It might be more sensible to have a quite different protocol for APRS.

That's exactly the thinking behind OpenTRAC.

Scott