WAGON-2252008-07-03T21-4213/Jan/10proxyInfoProvider is never used
WAGON-2262008-07-10T10-1127/Jul/08filePermissions and directoryPermissions are not set correctly.
WAGON-2242008-06-30T11-3327/Jul/08ChecksumObserver sets digest == null on transfer error, leading to NPE's if checksum downloads are retried with same observer instance