frps: release resources in service.Close() (#4667)

pkg/ssh/gateway.go

@@ -112,6 +112,10 @@ func (g *Gateway) Run() {
 	}
 }
 
+func (g *Gateway) Close() error {
+	return g.ln.Close()
+}
+
 func (g *Gateway) handleConn(conn net.Conn) {
 	defer conn.Close()
 

pkg/util/vhost/vhost.go

@@ -100,6 +100,10 @@ func (v *Muxer) SetRewriteHostFunc(f hostRewriteFunc) *Muxer {
 	return v
 }
 
+func (v *Muxer) Close() error {
+	return v.listener.Close()
+}
+
 type ChooseEndpointFunc func() (string, error)
 
 type CreateConnFunc func(remoteAddr string) (net.Conn, error)