Thread: pgsql: Update Windows installation notes.

Log Message:
-----------
Update Windows installation notes.

pginstaller isn't used anymore, in favor of the one-click installers.
Make it clear that we support Windows 2000 and newer with the native
port, instead of first saying we support NT4 and then saying we don't.

Tags:
----
REL8_4_STABLE

Modified Files:
--------------
    pgsql/doc/src/sgml:
        installation.sgml (r1.325.2.4 -> r1.325.2.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.325.2.4&r2=1.325.2.5)