incusd/cluster: Validate cluster HTTPS address on join too

Signed-off-by: Stéphane Graber <[email protected]>

cmd/incusd/api_cluster.go

@@ -430,11 +430,16 @@ func clusterPutJoin(d *Daemon, r *http.Request, req api.ClusterPut) response.Res
 		return response.BadRequest(fmt.Errorf("This server is already clustered"))
 	}
 
-	// The old pre 'clustering_join' join API approach is no longer supported.
+	// Validate erver address.
 	if req.ServerAddress == "" {
 		return response.BadRequest(fmt.Errorf("No server address provided for this member"))
 	}
 
+	err := validate.IsListenAddress(true, false, false)(req.ServerAddress)
+	if err != nil {
+		return response.BadRequest(fmt.Errorf("Invalid server address %q: %w", err))
+	}
+
 	localHTTPSAddress := s.LocalConfig.HTTPSAddress()
 
 	var config *node.Config