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)