[VOL-4291] Rw-core updates for gRPC migration

Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/soheilhy/cmux/go.mod b/vendor/github.com/soheilhy/cmux/go.mod
new file mode 100644
index 0000000..2be915f
--- /dev/null
+++ b/vendor/github.com/soheilhy/cmux/go.mod
@@ -0,0 +1,5 @@
+module github.com/soheilhy/cmux
+
+go 1.11
+
+require golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb