Bring in my fixes for KDE2 for users of XFree86 4.0.x. Basically, what this
involves is this: Cull GL from Qt by default, but still provide a Qt+GL
library that may or may not have threads. Then also provide a Qt library that
has threads but not GL. This allows us to make KDE2 depend on a library that
will *not* have threads, ever. Threads will be revisited at a later date.
Ports that require GL support need to be updated to use the hacked library,
libqtgl.so.4. The net result is that we bloat our qt2 package by 1.5-2.5MB
for compatability. Also, static qt will not have GL support.