Respect Proxy Options

Adds full SOCKS-proxy support to the Minecraft client by adding support for the built-in JVM arguments in the Netty pipeline.

You can, for example, use this in order to proxy the Minecraft client through Tor or a SSH dynamic proxy.

JVM Argument Configuration

| Name | Description | Default | Example | v4 | v5 |
|-------------------------|-------------------------------------------------------------------------------------------------------------|---------|-----------------------------------------|------|----------------------------------------------------------|
| socksProxyHost | The hostname of the SOCKS proxy to connect to. | | -DsocksProxyHost=127.0.0.1 | Yes | Yes. |
| socksProxyPort | The port the SOCKS proxy is operating on relative to the provided socksProxyHost | 1080 | -DsocksProxyHost=8080 | Yes. | Yes. |
| java.net.socks.username | The username to authenticate with. This is ignored if a java.net.Authenticator instance is configured. | | -Djava.net.socks.username=bob | Yes. | Yes, but the password argument must be provided as well. |
| java.net.socks.password | The password to authenticate with. This is also ignored if a java.net.Authenticator instance is configured. | | -Djava.net.socks.password=password123 | No. | Yes, but the username argument must be provided as well. |