Log Message:
-----------
Add catalogs.sgml documentation for text search catalogs.
Modified Files:
--------------
pgsql/doc/src/sgml:
catalogs.sgml (r2.158 -> r2.159)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/catalogs.sgml?r1=2.158&r2=2.159)