Revision 584272

fixes http://issues.apache.org/bugzilla/show_bug.cgi?id=43581
(custom datasources in cocoon.xconf were being nuked by an unspecific
lenya patchfile)
the approach is now to add to the <datasources/> element instead of
overwriting it, which mandates another patchfile that will make sure an
empty <datasources/> element is created first.

thanks to markus angst for this patch.

please test, i don't use custom datasources...