localedef: Improve cc_list parsing
original commit log:
I had originally suspected the parsing of ctype definition files as being
the source of the ctype flag mis-definitions, but it wasn't. In the
process, I simplified the cc_list parsing so I'm committing the no-impact
improvement separately. It removes some parsing redundancies and
won't parse partial range definitions anymore.
Submitted by: marino
Obtained from: Dragonfly
MFC after: 1 month