rsync 3.10 now defaults to human readable output, with sizes being
printed with a separator between group of 3 digits.
This broke our download progress parser.

We can fix this by using the --no-human-readable command line option,
to get the old rsync progress output format.

This option already existed in older rsync versions (tried in Mageia
2), so this change should be safe to include in backports of urpmi to
older distributions.

The whole 'don't ask for auth' bit is needed when running mgaoline to periodically
check for new updates. Other 'internal' uses of urpmi.update (namely in drakxtools)
can use the full, private path to the binary.

issue is that urpmi matches urpmi.* too (hence urpmi.update too) in first regexp
=> reverse regexpes order