Log Message:
-----------
Remove pre-7.3 mention that FOR UPDATE can be before LIMIT.
Document that FOR UPDATE and LIMIT together can return fewer rows that
LIMIT specifies, and why.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
select.sgml (r1.83 -> r1.84)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/select.sgml.diff?r1=1.83&r2=1.84)