Add script verification to OpCon

D272: Add the possibility that OpCon can check if the scripts on the "destination" server are the scripts that opcon should execute. Perhaps the scripts should reside on the opcon server, and be pushed to the server before they are executed. Or add the scripts into the database! Or implement an feature that the scripts should have been signed by OpCon and that the Agent gets the verification signature at execution time from OpCon, then these should match and the job can be executed savely.