Charset WIN1252

Hello Developers,

now, where the native Win32-Version of PostgreSQL is nearly ready for
Production use, I'm still missing support of WIN1252 charset. And UTF-8
can't be used on server side in West Europe, because it's implementation
isn't complete yet (e.g. upper() / lower() missing for umlauts).

Therefore I've added / modyfied all related sources, headers, and tables for
WIN1252-Support.

Because I can't build Win32-Version of PostgreSQL from source myself, please
let me know who of you would be so kind to add it to the project. I will
send the related ZIP (16 kByte) to everybody who is interested. Meanwhile I
use a binary patched version of the utf8_and_win1250.dll on Server side, so
I can use WIN1252 in the database, and both WIN1252 and UTF-8 on Client side
(but have to specify WIN1250).

With best regards,

Roland.

--
Roland Volkmann
Stuttgart / Germany