removed qsort_r() which seems unavailable on CygWin
removed qsort_r() which seems unavailable on CygWin

dago/libpsl,darnir/libpsl,dago/libpsl,rockdaboot/libpsl,dago/libpsl,rockdaboot/libpsl,darnir/libpsl,dkg/libpsl,rockdaboot/libpsl,dkg/libpsl,darnir/libpsl