Log Message:
-----------
Improve description of Execute message behavior, per Oliver Jowett.
Modified Files:
--------------
pgsql-server/doc/src/sgml:
protocol.sgml (r1.53 -> r1.54)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/src/sgml/protocol.sgml.diff?r1=1.53&r2=1.54)