[aprssig] Some obscure APRS client questions

[Bob Bruninga]

> The .POS files came from Bob's original APRSDOS which was before UI-View.

> Like Patrick said "based on software which is dead".  
> I load them for backward compatibility, but have no
> plans for maintaining nor extending them from within APRSISCE/32.
]
Actually every APRS program eventually used them.  APRSdos, MacAPRS,
WinAPRS, APRS+, UIview, etc... It was part of the standard.  Is this
something else that did not get into the spec?  If so, Ill correct it.

Thanks
Bob