Safety logic check, don't try to stop a stopped server when suspending; closes #2318

Couldn't actually reproduce this, but a good sanity check I guess.

server/update.go

@@ -143,6 +143,7 @@ func (s *Server) SyncWithEnvironment() {
 	} else {
 		// Checks if the server is now in a suspended state. If so and a server process is currently running it
 		// will be gracefully stopped (and terminated if it refuses to stop).
+		if s.GetState() != environment.ProcessOfflineState {
 			s.Log().Info("server suspended with running process state, terminating now")
 
 			go func(s *Server) {
@@ -151,4 +152,5 @@ func (s *Server) SyncWithEnvironment() {
 				}
 			}(s)
 		}
+	}
 }