FS-7760: [mod_sofia]

added xml fetch for channels to externally support nightmare transfer
depends on channel-xml-fetch-on-nightmare-transfer profile param (default is disabled)

src/mod/endpoints/mod_sofia/mod_sofia.h

@@ -282,6 +282,8 @@ typedef enum {
 	PFLAG_ENABLE_CHAT,
 	PFLAG_AUTH_SUBSCRIPTIONS,
 	PFLAG_PROXY_REFER,
+	PFLAG_CHANNEL_XML_FETCH_ON_NIGHTMARE_TRANSFER,
+
 	/* No new flags below this line */
 	PFLAG_MAX
 } PFLAGS;