Other Amq options
-----------------
Two other operations are implemented. These modify the state of Amd
as a whole, rather than any particular filesystem. The `-x' and `-D'
options have exactly the same effect as Amd's corresponding command
line options.
When Amd receives a `-x' flag it limits the log options being
modified to those which were not enabled at startup. This prevents a
user turning _off_ any logging option which was specified at startup,
though any which have been turned on since then can still be turned
off. The `-D' option has a similar behavior.