pass header in X-FS headers on attended transfer CID update to indicate specific situation to flip callee/caller id when targeting a 1 legged call

src/include/switch_channel.h

@@ -315,6 +315,7 @@ SWITCH_DECLARE(switch_status_t) switch_channel_caller_extension_masquerade(switc
 */
 SWITCH_DECLARE(void) switch_channel_set_caller_extension(switch_channel_t *channel, switch_caller_extension_t *caller_extension);
 
+SWITCH_DECLARE(void) switch_channel_flip_cid(switch_channel_t *channel);
 SWITCH_DECLARE(void) switch_channel_sort_cid(switch_channel_t *channel, switch_bool_t in);
 
 /*!

src/include/switch_types.h

@@ -1107,6 +1107,8 @@ typedef enum {
 	CF_DIALPLAN,
 	CF_BLOCK_BROADCAST_UNTIL_MEDIA,
 	CF_CNG_PLC,
+	CF_ATTENDED_TRANSFER,
+	CF_LAZY_ATTENDED_TRANSFER,
 	/* WARNING: DO NOT ADD ANY FLAGS BELOW THIS LINE */
 	CF_FLAG_MAX
 } switch_channel_flag_t;