Wrong startup script of PostgreSQL 9.1.2 under OpenBSD 5.1

On page http://www.postgresql.org/docs/9.1/interactive/server-start.html
was published a wrong startup script for automatic starting PostgeSQL
during boot under OpenBSD.

Here is a working one which should be placed into /etc/rc.local file:

if [ -x /usr/local/bin/pg_ctl -a -x /usr/local/bin/postgres ]; then
su - _postgresql -c '/usr/local/bin/pg_ctl -D /var/postgresql/data
start -l /var/postgresql/logfile -s'
echo -n 'postgresql'
fi

Please correct your manual pages ASAP in order to prevent spending
time to fix it.

Denis