Description of 49308.dat and its sister parts

[Philippe Hurbain]

This isn't a good reason to be contrary to the spec. There are quite a few part that deviate from the spec in one way or another as recycling them just to align them with a non-geometry spec change is dumb. However, all efforts should be made to ensure all new or revised part do conform.

What I meant is that perhaps the specs should be clarified/updated...