some new explorers wich are handy if you must tune for example sap or
oracle to the systemtype, cpu cores and/or physical memory
as requested, replace space with _
Merge branch 'feature_new_explorers' of https://github.com/dheule/cdist
release date for 3.1.1

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>