Here's what I have staged for commit. I didn't like how v4 added the ERROR
to ParseLongOption(), so in v5 I've moved it to the callers of
ParseLongOption(), which is where the existing option validation lives.
This results in a bit of code duplication, but IMHO that's better than
adding nonobvious behavior to ParseLongOption().
Barring additional feedback or cfbot failures, I'm planning on committing
this shortly.
--
nathan