Changes/additions to input character set handling:
- After discussion with Simon, change the default input charset back to ASCII,
rather than trying to work it out from the locale, for the sake of promoting
.but file portability.
- Add a new command-line option "--input-charset=csname", which overrides the
ASCII default for all input files (since there's no other way to use a
non-ASCII-compatible input file).
- Output a warning if -Cinput-charset:foo is specified that it has no effect.
- Update the docs to match all this. Also try to clarify some other things in
this area that caught me out.
git-svn-id: svn://svn.tartarus.org/sgt/halibut@5332
cda61777-01e9-0310-a592-
d414129be87e