- do not override default graphics system (let authors be blamed) as raster:

- do not override default graphics system (let authors be blamed) as raster:
 - doesn't work well via network (it's dramatically slow),
 - doesn't support subpixel rendering (only native/X11 does!),
 - have (had?) some issues with some software (hardware related?),
 - has unknown RAM/power usage, measure influence before switching!
 - while speeding up some ops it slows down others - qtperf default benchmark
   is 2 times slower! and I do not care about KDE or other eye-candy shit,
- packaged env.d variable for system-wide configuration of default backend,
- rel. 4

Changed files:
    qt4.spec -> 1.312