Blacklisting uses a dedicated action to parse arguments into enumeration
members.
Choices are not provided for this option, as it would utterly overwhelm
the help interface. This means that errors may not be as helpful,
however.
The README has been updated with a small section on blacklisting, how to
do it, and why you may wish to do it.
Options that were previously commented out are now enabled, since the
user can simply blacklist them instead.
Jeremy Saklad
be44c9c489
