Sandbox: Remove multiple stages

While interesitng in theory, there is nothing to be gained here,
because we don't really have user input at those early stages.

As we are also not a privileged process, those early stage
sandboxes in the end are not worth it, since they increase
complexity while there is no benefit in practise.

So, reduce those 3 stages to a single one (enable()), which we
activate after CLI server has launched.

sandbox/sandbox.h

@@ -10,16 +10,7 @@ class Sandbox
 	/* Whether the platform has everything required to active all sandbnox modes */
 	virtual bool supported() = 0;
 
-	/* Activated early. At this point, we need more system calls
-	 * than later on */
-	virtual bool enableForInit() = 0;
-
-	/* Activated after config has been read. Now we now which paths we need access to */
-	virtual bool enablePreWorker(std::vector<std::string> fsPaths) = 0;
-
-	/* Activated after we have acquired resources (bound to ports etc.)
-	 *
-	 * This should allow us to further restrcit the process */
-	virtual bool enableForWorker() = 0;
+	/* Activated after we have acquired resources (bound to ports etc.)*/
+	virtual bool enable(std::vector<std::string> fsPaths) = 0;
 };
 #endif