Log Message:-----------Document that chr(0) is not supported, and why.
Modified Files:-------------- pgsql/doc/src/sgml: func.sgml (r1.420 -> r1.421) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.420&r2=1.421)
