[Gentoo] Modularizing X ebuilds

Tonight I started work on the modular X ebuilds for 7.0. It went reasonably quickly after I wrote a script to autogenerate tarballs and ebuilds, then install them. I’m still fixing up their dependencies manually, however, so that’s a bit of a slowdown. I made 71 packages — all of the protocol headers and libraries — out of roughly 230 available and autotooled in Xorg CVS.

The main weirdness was module-name overlap between proto/X11 and lib/X11, so I switched the proto one’s name to xproto. I wonder why it isn’t called that in CVS.