WireGuard proxy: Release packet views after use (#6801)

https://github.com/XTLS/Xray-core/pull/6801#issuecomment-5807228464

proxy/wireguard/netstack.go

@@ -136,6 +136,7 @@ func (tun *netTun) Read(buf [][]byte, sizes []int, offset int) (int, error) {
 	}
 
 	n, err := view.Read(buf[0][offset:])
+	view.Release()
 	if err != nil {
 		return 0, err
 	}
@@ -175,6 +176,7 @@ func (tun *netTun) WriteNotify() {
 	select {
 	case tun.incomingPacket <- view:
 	case <-tun.closed:
+		view.Release()
 	}
 }