Log Message:
-----------
Update tutorial on the fact that backslash commands are no longer listed in
psql's startup banner.
Modified Files:
--------------
pgsql/doc/src/sgml:
start.sgml (r1.50 -> r1.51)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/start.sgml?r1=1.50&r2=1.51)