Log Message:
Update amanda to 2.4.4p4

Bug fix release and minor improvements:

new chg-iomega changer script.
amanda will not use a tape if it's label is not in the tapelist file.
amflush.c: Don't start a driver if nothing to flush.
amadmin.c: Call check_dumpuser() as soon as posible.
amadmin.c: Don't core dump if DUMPCYLE is too  big.
dumper.c: Parse warning message.