VSCode only connects to a localhost TCP host

[thoom]

The VSCode extension only connects to a TCP host on 127.0.0.1. This works fine for most PHP setups. However, if using PHP in a docker container on Docker for Mac with a loopback, it cannot connect since the host IP is not 127.0.0.1.

The language server supports talking to another TCP host, but there isn't a configuration option to do so in VSCode.

A php.tcpHost user setting should be added to support connecting to another TCP host.