improve download hack: use rpmExpandNumeric for macro checking and use %(...) instead of a plain system(3)
improve download hack: use rpmExpandNumeric for macro checking and use %(...) instead of a plain system(3)

devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5