launch_daemon: Improved target support.

* You can now put jobs/services into a target.
* Instead of having Login started as part of the normal boot process,
  it's now in the "login" target.
* The app_server now launches the login target when a login becomes
  available (ie. during startup, but that could be improved later on).

headers/private/app/LaunchDaemonDefs.h

@@ -19,14 +19,15 @@
 namespace BPrivate {
 
 #define kLaunchDaemonSignature "application/x-vnd.Haiku-launch_daemon"
-#define B_LAUNCH_DAEMON_PORT_NAME	"system:launch_daemon"
+#define B_LAUNCH_DAEMON_PORT_NAME "system:launch_daemon"
 
 
 // message constants
 enum {
 	B_GET_LAUNCH_DATA			= 'lnda',
+	B_LAUNCH_TARGET				= 'lntg',
 	B_LAUNCH_SESSION			= 'lnse',
-	B_REGISTER_LAUNCH_SESSION	= 'lnrs',
+	B_REGISTER_SESSION_DAEMON	= 'lnrs',
 };
 
 

headers/private/app/LaunchRoster.h

@@ -22,6 +22,9 @@ public:
 			port_id				GetPort(const char* signature,
 									const char* name);
 
+			status_t			Target(const char* name, BMessage& data,
+									const char* baseName = NULL);
+
 			status_t			StartSession(const char* login,
 									const char* password);
 

headers/private/app/LaunchRosterPrivate.h

@@ -14,7 +14,7 @@ public:
 								Private(BLaunchRoster* roster);
 								Private(BLaunchRoster& roster);
 
-			status_t			RegisterSession(const BMessenger& target);
+			status_t			RegisterSessionDaemon(const BMessenger& daemon);
 
 private:
 			BLaunchRoster*		fRoster;