Formatter broken when use socks5 proxy

[Ksc0721]

According to Visual Code's http.proxy settings https://github.com/microsoft/vscode/blob/main/src/vs/platform/request/common/request.ts#L143

It could be "socks5://10.1.2.3:7777", and doesn't match vscode-xml's HOST_AND_PORT_EXTRACTOR
https://github.com/redhat-developer/vscode-xml/blob/main/src/settings/proxySettings.ts#L155

In a word, it will produce a Cannot read properties of null (reading '1') exception, and the language client will not started.

[angelozerr]

Is there any chance to have a PR?

[ivanbarsukov]

Unfortunately, not only formatting, but the entire extension does not work if socks5 proxy is enabled