rename InitializeDropper->StartDropper

makes more sense that way since it includes starting a thread and not
just initializing data

src/web/drop_privilege_linux.go

@@ -91,7 +91,7 @@ func (dropper *PrivilegeDropper) run() {
 	}
 }
 
-func InitializeDropper(execution_channel chan ExecutionInfo) error {
+func StartDropper(execution_channel chan ExecutionInfo) error {
 	server, err := user.Current()
 	if err != nil {
 		return err

src/web/web.go

@@ -661,12 +661,12 @@ func main() {
 	}
 
 	drop_queue := make(chan ExecutionInfo, user_number)
-	err = InitializeDropper(drop_queue)
+	err = StartDropper(drop_queue)
 	if err != nil {
 		log.Fatalf("Fatal: cannot run privilege dropper: %s", err)
 	}
 	// run two droppers for more parallelism
-	err = InitializeDropper(drop_queue)
+	err = StartDropper(drop_queue)
 	if err != nil {
 		log.Fatalf("Fatal: cannot run privilege dropper: %s", err)
 	}