[PATCH] xserver xf86PrintModeline(): print DisplayMode type bits.

[Jesse Adkins]

This applies cleanly and I should be able to test it pretty soon.
Assuming this is the only patch to be applied, I'd like some
explanation in the code as to why some of the letters are capitalized.
As a suggestion :

/* U and P are capitalized because USERPREF and PREFERRED have
priority when sorting. */

Some explanation in the git commit wouldn't hurt either. Perhaps :

This is rather useful if you're trying to figure out where a mode
might have come from.