Prevent incompatible option combinations.

checkmodule -m and -b are fundamentally incompatible with each other,
so reject attempts to use them together.

Resolves
https://bugzilla.redhat.com/show_bug.cgi?id=1064603

Also fix the error message for -m with -U to use stderr.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
1 file changed