pgsql: Add support for Win1252 encoding.

Log Message:
-----------
Add support for Win1252 encoding.

Roland Volkmann

Modified Files:
--------------
pgsql/doc/src/sgml:
charset.sgml (r2.68 -> r2.69)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/charset.sgml.diff?r1=2.68&r2=2.69)
func.sgml (r1.240 -> r1.241)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml.diff?r1=1.240&r2=1.241)
pgsql/src/backend/utils/mb:
encnames.c (r1.24 -> r1.25)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/encnames.c.diff?r1=1.24&r2=1.25)
wchar.c (r1.42 -> r1.43)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/wchar.c.diff?r1=1.42&r2=1.43)
pgsql/src/backend/utils/mb/conversion_procs:
Makefile (r1.12 -> r1.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/Makefile.diff?r1=1.12&r2=1.13)
pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859:
utf8_and_iso8859.c (r1.12 -> r1.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859/utf8_and_iso8859.c.diff?r1=1.12&r2=1.13)
pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1250:
utf8_and_win1250.c (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1250/utf8_and_win1250.c.diff?r1=1.10&r2=1.11)
pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1256:
utf8_and_win1256.c (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1256/utf8_and_win1256.c.diff?r1=1.10&r2=1.11)
pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win874:
utf8_and_win874.c (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win874/utf8_and_win874.c.diff?r1=1.10&r2=1.11)
pgsql/src/bin/initdb:
initdb.c (r1.78 -> r1.79)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/initdb/initdb.c.diff?r1=1.78&r2=1.79)
pgsql/src/include/mb:
pg_wchar.h (r1.57 -> r1.58)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/mb/pg_wchar.h.diff?r1=1.57&r2=1.58)
pgsql/src/test/regress/expected:
conversion.out (r1.10 -> r1.11)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/conversion.out.diff?r1=1.10&r2=1.11)
pgsql/src/test/regress/sql:
conversion.sql (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/conversion.sql.diff?r1=1.7&r2=1.8)

Added Files:
-----------
pgsql/src/backend/utils/mb/Unicode:
utf8_to_win1252.map (r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/Unicode/utf8_to_win1252.map?rev=1.3&content-type=text/x-cvsweb-markup)
win1252_to_utf8.map (r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/Unicode/win1252_to_utf8.map?rev=1.3&content-type=text/x-cvsweb-markup)
pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1252:
Makefile (r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1252/Makefile?rev=1.3&content-type=text/x-cvsweb-markup)
utf8_and_win1252.c (r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/conversion_procs/utf8_and_win1252/utf8_and_win1252.c?rev=1.3&content-type=text/x-cvsweb-markup)