launch_daemon: Added stop target ability.

* Before, you had to stop each job by itself.

headers/private/app/LaunchDaemonDefs.h

@@ -26,6 +26,7 @@ namespace BPrivate {
 enum {
 	B_GET_LAUNCH_DATA			= 'lnda',
 	B_LAUNCH_TARGET				= 'lntg',
+	B_STOP_LAUNCH_TARGET		= 'lnst',
 	B_LAUNCH_JOB				= 'lnjo',
 	B_ENABLE_LAUNCH_JOB			= 'lnje',
 	B_STOP_LAUNCH_JOB			= 'lnsj',

headers/private/app/LaunchRoster.h

@@ -33,6 +33,8 @@ public:
 			status_t			Target(const char* name,
 									const BMessage* data = NULL,
 									const char* baseName = NULL);
+			status_t			StopTarget(const char* name,
+									bool force = false);
 
 			status_t			Start(const char* name);
 			status_t			Stop(const char* name, bool force = false);