2.4.6

• dhtrunner: removed ability to switch between the local and proxy dht nodes during runtime with a single dhtrunner. This feature was unused, broken, and was adding overhead. To switch between proxy and local client (or run both at the same time), create new dhtrunner instances.
• dhtrunner: don't bind UDP ports when acting as a proxy client.
• dhtrunner: fixed a bug that could cause the node state to be overridden when using the state_path configuration field.
• python/tools: updated virtual network builder ( @svinota )