[core] add SCSC_SHUTDOWN_CAUSE

src/include/private/switch_core_pvt.h

@@ -305,6 +305,7 @@ struct switch_runtime {
 	uint32_t port_alloc_flags;
 	char *event_channel_key_separator;
 	uint32_t max_audio_channels;
+	switch_call_cause_t shutdown_cause;
 };
 
 extern struct switch_runtime runtime;

src/include/switch_types.h

@@ -2292,7 +2292,8 @@ typedef enum {
 	SCSC_SPS_PEAK_FIVEMIN,
 	SCSC_SESSIONS_PEAK,
 	SCSC_SESSIONS_PEAK_FIVEMIN,
-	SCSC_MDNS_RESOLVE
+	SCSC_MDNS_RESOLVE,
+	SCSC_SHUTDOWN_CAUSE
 } switch_session_ctl_t;
 
 typedef enum {