Decouple -a/-u effects from -c

Decouple -a/-u effects from -c

As described in issue #295, the option combinations "-c N -u"
and "-c N -a" inadvertently have the same effect as "-c N -q".
Prevent this by first acting on -c, which includes disabling
either -a or -u, if -c is given, before acting on -a/-u.