Adding Obj-C binding for RTCConfiguration::max_ipv6_networks.

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
index 17d79b2ed944c60e592a7a01e2b91bf31ed5ab4f..fcb62b94168ea5b67df4f2e3860d1ec12bdd0287 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCConfiguration.h
@@ -84,6 +84,15 @@ RTC_EXPORT
 @property(nonatomic, assign) RTCCandidateNetworkPolicy candidateNetworkPolicy;
 @property(nonatomic, assign)
     RTCContinualGatheringPolicy continualGatheringPolicy;
+
+/** By default, the PeerConnection will use a limited number of IPv6 network
+ *  interfaces, in order to avoid too many ICE candidate pairs being created
+ *  and delaying ICE completion.
+ *
+ *  Can be set to INT_MAX to effectively disable the limit.
+ */
+@property(nonatomic, assign) int maxIPv6Networks;
+
 @property(nonatomic, assign) int audioJitterBufferMaxPackets;
 @property(nonatomic, assign) BOOL audioJitterBufferFastAccelerate;
 @property(nonatomic, assign) int iceConnectionReceivingTimeout;