Make the parser both more strict, by not ignoring errors reported
by virStrToLong_ui(), and more permissive, by not failing due to
unrelated fields which just happen to have a know prefix and
accepting any amount of whitespace before the numeric value.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NBjoern Walk <bwalk@linux.vnet.ibm.com>