pgsql: Update Win32 item: < o Disallow encodings like UTF8

Log Message:
-----------
Update Win32 item:

<         o Disallow encodings like UTF8 which PostgreSQL supports
<           but the operating system does not (already disallowed by
<       pginstaller)
>         o Add support for Unicode
<       To fix UTF8, the data needs to be converted to UTF16 and then
<       the Win32 wcscoll() can be used, and perhaps other functions
>       To fix this, the data needs to be converted to/from UTF16/UTF8
>           so the Win32 wcscoll() can be used, and perhaps other functions
<       locales but provides no ordering.
<
>       locales but provides no ordering or character set classes.

Modified Files:
--------------
    pgsql/doc:
        TODO (r1.1462 -> r1.1463)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1462&r2=1.1463)