Add warning banner to imageserver if in insecure mode.
Add warning banner to imageserver if in insecure mode.

rgooch/Dominator,Symantec/Dominator,keep94/Dominator,Symantec/Dominator,keep94/Dominator,keep94/Dominator,rgooch/Dominator,rgooch/Dominator,Symantec/Dominator