optionally specify a file name (e.g. \c{--man=myfile.5}), in which
case Halibut will change the name of the output file as well.
+If you do not specify any of the above options, Halibut will simply
+produce \e{all} of its output formats.
+
Also, there is an option which allows you to specify an arbitrary
\i\c{\\cfg} configuration directive (see \k{input-config}):