FS-5886 --resolve add NDLB_broken_opus_sdp which must be set as a global…

FS-5886 --resolve add NDLB_broken_opus_sdp which must be set as a global variable in var.xml or switch.conf.xml to enable broken opus mode for back compat with counterpath mobile

src/switch_core_media.c

@@ -226,7 +226,7 @@ SWITCH_DECLARE(int) switch_core_media_crypto_keylen(switch_rtp_crypto_key_type_t
 
 static int get_channels(const char *name, int dft)
 {
-	if (!strcasecmp(name, "opus")) {
+	if (switch_false(switch_core_get_variable("NDLB_broken_opus_sdp")) && !strcasecmp(name, "opus")) {
 		return 2; /* IKR???*/
 	}