GL_RENDERER strings. Possible fix for bug 239890. CCBUG: 239890 svn path=/trunk/KDE/kdebase/workspace/; revision=1131729
use direct rendering. - Move the LIBGL_ALWAYS_INDIRECT code to CompositingPrefs::detect(), and use the external helper program to determine if the variable needs to be set. svn path=/trunk/KDE/kdebase/workspace/; revision=1096554