Alternative way of loading to "fall back"

[mbvyd]

Some 3rd parties do not authenticate to proxy with such kind of extension being fed as file, e.g. https://github.com/fysh711426/UndetectedChromeDriver

But they do authenticate when the extension is loaded through command-line from folder.

API usage is left intact for general use cases, but ability to use second approach is also there, e.g.:

ChromeOptions.AddProxyAuthenticationExtension(
    new Proxy(ProxyProtocols.HTTP, "proxy_server:proxy_port:proxy_username:proxy_password"),
    pack: false);