Log Message:
-----------
Add note clarifying that indexes that support ordered scans had better
allow clauseless scans.
Modified Files:
--------------
pgsql/doc/src/sgml:
indexam.sgml (r2.3 -> r2.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/indexam.sgml.diff?r1=2.3&r2=2.4)