Fail codecs.lookup() on 'mbcs' and 'tactis'

[Richard Brodie]

<jepler at unpythonic.net> wrote in message
news:mailman.2717.1123167085.10512.python-list at python.org...

> I don't know what 'tactis' is, but 'mbcs' is not a portable character set name.
> It's a special character set name on win32, which refers to some system-specific
> multibyte character set.
>
> I don't think these "failures" are a Python bug.

I suppose, for consistency, it should ideally raise LookupError, though