make device state code more accurate

src/include/switch_core.h

@@ -100,6 +100,9 @@ typedef struct switch_device_stats_s {
 	uint32_t held;
 	uint32_t held_in;
 	uint32_t held_out;
+	uint32_t unheld;
+	uint32_t unheld_in;
+	uint32_t unheld_out;
 	uint32_t hup;
 	uint32_t hup_in;
 	uint32_t hup_out;

src/include/switch_types.h

@@ -1184,7 +1184,7 @@ typedef enum {
 	CCS_HELD,
 	CCS_RING_WAIT,
 	CCS_HANGUP,
-	CCS_UNHOLD
+	CCS_UNHELD
 } switch_channel_callstate_t;
 
 typedef enum {
@@ -1193,6 +1193,7 @@ typedef enum {
 	SDS_ACTIVE,
 	SDS_ACTIVE_MULTI,
 	SDS_HELD,
+	SDS_UNHELD,
 	SDS_HANGUP
 } switch_device_state_t;