Implemented sout-keep per media support.

You have to use sout-keep option on your broadcast media using 
 > setup your_media option sout-keep
The default value is no-sout-keep and command line option --sout-keep
will not activate it (on purpose).

src/input/vlm_internal.h

@@ -42,8 +42,11 @@ typedef struct
     /* "playlist" index */
     int i_index;
 
-    input_item_t   item;
-    input_thread_t *p_input;
+    vlc_bool_t      b_sout_keep;
+
+    input_item_t    item;
+    input_thread_t  *p_input;
+    sout_instance_t *p_sout;
 
 } vlm_media_instance_t;
 
@@ -114,10 +117,4 @@ struct vlm_t
     vlm_schedule_t **schedule;
 };
 
-vlm_media_t *vlm_MediaNew( vlm_t *, const char *, int );
-void		 vlm_MediaDelete( vlm_t *, vlm_media_t *, const char * );
-int	 		 vlm_MediaSetup( vlm_t *, vlm_media_t *, const char *, const char * );
-int			 vlm_MediaControl( vlm_t *, vlm_media_t *, const char *, const char *, const char * );
-vlm_media_t *vlm_MediaSearch( vlm_t *, const char *);
-
 #endif