Held files on PT

[Gerald Lasser]

the "ring" ones are the newer ones.

in the past we were forced to abbreviate it to "rin" due to the then-existing 8.3 filename limit.

that no longer exists, and we decided to go for the clearer name "ring".

if a "rin" file exists on the PT, it should be moved to "ring" AFAIK.

The ones I am referring to are:

on PT: p/48/1-4ring15.dat  -> official already: p/48/1-4rin15.dat
on PT: p/48/1-4ring21.dat  -> official already: p/48/1-4rin21.dat


All parts that used those "ring" in the past are now using the existing hi-res prims "rin"

those can go immediately :-)