Log Message:-----------Improve discussion of SQL functions taking/returning row types.
Modified Files:-------------- pgsql/doc/src/sgml: xfunc.sgml (r1.92 -> r1.93) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xfunc.sgml.diff?r1=1.92&r2=1.93)
