[aprssig] New Overlay Symbols

[Robert Bruninga]

Fixed these additional comments also.

> http://www.aprs.org/symbols/symbolsX.txt (20 Oct 2009)
> http://www.aprs.org/symbols/symbols-new.txt (13 Oct 2009)
> 
> On the former, the table shows:
> 
> \)  OJO Firenet MEO, MODIS Earth Obs.
> 
> Which would tell me that the alternate table's #) 
> symbol is where the custom Firenet definitions 
> would be found.  However, the latter page
> doesn't seem to have any definitions for #).

If there is a standard definition of those overlays, I would be
happy to add them to the latter page.  Anyone have these?
Thanks..

> Also, on the latter page:
> /A PA  Aid Station   \A  AA# OVERLAYED BOX  (XA=XO laptop)

> ...the mention of XA ...didn't make it into the overlay 
> table for #A either.

Fixed..
Thanks
Bob