TUN-5246: Use protocol: quic for Quick tunnels if one is not already set

Author: sudarshan-reddy

cmd/cloudflared/tunnel/quick_tunnel.go

@@ -70,6 +70,10 @@ func RunQuickTunnel(sc *subcommandContext) error {
 		sc.log.Info().Msg(line)
 	}
 
+	if !sc.c.IsSet("protocol") {
+		sc.c.Set("protocol", "quic")
+	}
+
 	return StartServer(
 		sc.c,
 		version,