Log Message:
-----------
Test plpgsql and slony schema before trying to add/purge
Modified Files:
--------------
slony-ctl/outils:
create_slon.sh (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/slony1-ctl/slony-ctl/outils/create_slon.sh?r1=1.5&r2=1.6)