Log Message:
-----------
Improve documentation about GiST opclass support functions.
Dimitri Fontaine
Modified Files:
--------------
pgsql/doc/src/sgml:
gist.sgml (r1.30 -> r1.31)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/gist.sgml?r1=1.30&r2=1.31)