Log Message:
-----------
Document that only a table's owner may TRUNCATE it. Per Keith Worthington.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
truncate.sgml (r1.18 -> r1.19)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/truncate.sgml.diff?r1=1.18&r2=1.19)