Log Message:
-----------
Document the behavior of STRICT VARIADIC functions.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
create_function.sgml (r1.88 -> r1.89)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_function.sgml?r1=1.88&r2=1.89)