character set configuration to UTF-8, on both Windows and Unix, and
reorganise the dropdown lists in the Translation menu so that UTF-8
appears at the top (and Unix's odd "use font encoding" is relegated to
the bottom of the list like the special-purpose oddity it is).
[originally from svn r9843]
implementations of libcharset, since we've had at least one request for
it in PuTTY.
[originally from svn r6499]
[this svn revision also touched charset,filter,halibut,timber]
Simon Tatham
Ben Harris
Jacob Nevins