pgsql: Make JOHAB client only encoding per discussions in pgsql-hackers

Log Message:
-----------
Make JOHAB client only encoding per discussions in pgsql-hackers
"Server-side support of all encodings" around 2007/3/26.
initdb required.

Modified Files:
--------------
    pgsql/doc/src/sgml:
        charset.sgml (r2.82 -> r2.83)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/charset.sgml.diff?r1=2.82&r2=2.83)
    pgsql/src/backend/utils/mb:
        encnames.c (r1.32 -> r1.33)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/encnames.c.diff?r1=1.32&r2=1.33)
        wchar.c (r1.61 -> r1.62)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/wchar.c.diff?r1=1.61&r2=1.62)
    pgsql/src/include/catalog:
        catversion.h (r1.403 -> r1.404)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h.diff?r1=1.403&r2=1.404)
    pgsql/src/include/mb:
        pg_wchar.h (r1.71 -> r1.72)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/mb/pg_wchar.h.diff?r1=1.71&r2=1.72)