m/n/c/curator: listen on public gRPC

This enables listening on CuratorPort (which was called
NodeServicePort) using TLS node certificates. No service is yet running
on the new gRPC listener.

Change-Id: I436ac1ae9cbdb257419ad114262fc2a7516396b1
Reviewed-on: https://review.monogon.dev/c/monogon/+/288
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/node/ports.go b/metropolis/node/ports.go
index c63ec38..ed1c323 100644
--- a/metropolis/node/ports.go
+++ b/metropolis/node/ports.go
@@ -17,7 +17,7 @@
 package node
 
 const (
-	NodeServicePort     = 7835
+	CuratorServicePort  = 7835
 	ConsensusPort       = 7834
 	MasterServicePort   = 7833
 	ExternalServicePort = 7836