pgsql-server: Add hint about using GRANT with non-trusted languages.

Log Message:
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Add hint about using GRANT with non-trusted languages.

James William Pye

Modified Files:
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pgsql-server/src/backend/catalog:
aclchk.c (r1.104 -> r1.105)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/catalog/aclchk.c.diff?r1=1.104&r2=1.105)