ICL8 math calls
libvgls-win32 working, debug glx-libvgls
Under XFree 4.2.0:with DRI - no glXGetProcAddressARB(), and:
	!!! GPF in _XFreeAtomTable after XSetWMProtocols (sic!) !!!
Under NVGLX - all Ok (even with dlopen() / dlsym()).

implement arch/common/uicore.c (from common/winlib.c)

lock entire vfs - anyway, reading disk from 2 threads _is_ a bad idea !!!
(but ... check for reparse points / mounts / binds ???)
reimplement vfsOpenFile(char_p); (annoying warnings) need:
	int vfsSearchTree(int_p flags), vhandle_t vfsOpenFile(int), vdir_t vfsOpenDir(int).
"invalidate" operation in IPL
