[aprssig] Tactical call signs

[John Habbinga]

I was responding to the use of CW for use as an ID when using a digipeater. 
Since CW will not translate through a digipeater, then you can't use it as 
an ID when using a digipeater.  Your callsign needs to be contained in the 
UI frame.  Where in the UI frame probably doesn't matter, as long as it is 
somewhere that the digipeater will not strip it out.

> It doesn't say
> that I can't digipeat tactical calls, only that I need to authenticate
> them or take responsibility for their content.