[aprssig] Time to UPGRADE obsolete DIGIS!

[Bob Bruninga]

> Personally, I think that for UITRACE, one should 
> be using the "TRACE" word, as it's an obvious 
> connection between the meaning of the word 
> and the way it's supposed to be used. 

All "Traceable WIDEn-N" does is put WIDEn-N in the UITRACE parameter so it is traceable and eliminate all other obsolete paths.  So still it does what the word means, makes all APRS packets "traceable".