rename packetHandlerMap.Close() to Destroy()

server.go

@@ -33,7 +33,7 @@ type unknownPacketHandler interface {
 }
 
 type packetHandlerManager interface {
-	io.Closer
+	Destroy() error
 	SetServer(unknownPacketHandler)
 	CloseServer()
 	sessionRunner
@@ -305,7 +305,7 @@ func (s *baseServer) Close() error {
 	// If the server was started with ListenAddr, we created the packet conn.
 	// We need to close it in order to make the go routine reading from that conn return.
 	if s.createdPacketConn {
-		err = s.sessionHandler.Close()
+		err = s.sessionHandler.Destroy()
 	}
 	s.closed = true
 	close(s.errorChan)