pgsql: Add manvolnum, so that man pages are generated.

Log Message:
-----------
Add manvolnum, so that man pages are generated.

Modified Files:
--------------
pgsql/doc/src/sgml/ref:
alter_foreign_data_wrapper.sgml (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml?r1=1.2&r2=1.3)
alter_server.sgml (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_server.sgml?r1=1.1&r2=1.2)
alter_user_mapping.sgml (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_user_mapping.sgml?r1=1.2&r2=1.3)
create_foreign_data_wrapper.sgml (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_foreign_data_wrapper.sgml?r1=1.4&r2=1.5)
create_server.sgml (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_server.sgml?r1=1.4&r2=1.5)
create_user_mapping.sgml (r1.5 -> r1.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_user_mapping.sgml?r1=1.5&r2=1.6)
drop_foreign_data_wrapper.sgml (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_foreign_data_wrapper.sgml?r1=1.1&r2=1.2)
drop_server.sgml (r1.1 -> r1.2)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_server.sgml?r1=1.1&r2=1.2)
drop_user_mapping.sgml (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/drop_user_mapping.sgml?r1=1.2&r2=1.3)