Introduce connector, to help subchannel connect
diff --git a/gRPC.podspec b/gRPC.podspec
index 1707ee7..862c24b 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -159,6 +159,7 @@
                       'src/core/channel/http_server_filter.h',
                       'src/core/channel/noop_filter.h',
                       'src/core/client_config/client_config.h',
+                      'src/core/client_config/connector.h',
                       'src/core/client_config/lb_policies/pick_first.h',
                       'src/core/client_config/lb_policy.h',
                       'src/core/client_config/resolver.h',
@@ -280,6 +281,7 @@
                       'src/core/channel/http_server_filter.c',
                       'src/core/channel/noop_filter.c',
                       'src/core/client_config/client_config.c',
+                      'src/core/client_config/connector.c',
                       'src/core/client_config/lb_policies/pick_first.c',
                       'src/core/client_config/lb_policy.c',
                       'src/core/client_config/resolver.c',
@@ -411,6 +413,7 @@
                               'src/core/channel/http_server_filter.h',
                               'src/core/channel/noop_filter.h',
                               'src/core/client_config/client_config.h',
+                              'src/core/client_config/connector.h',
                               'src/core/client_config/lb_policies/pick_first.h',
                               'src/core/client_config/lb_policy.h',
                               'src/core/client_config/resolver.h',