freemountd:  Axe unused n_params
freemountd:  Just exit() from bad_usage()

Don't return NULL from get_options().
freemountd:  Use char* const* for argv
freemountd:  Minor tweak to simplify next patch
freemountd:  Rewrite option processing
freemountd:  Clean up

This is a separate change from the previous so as not to confuse diff.
Merge branch 'freemountd-options'