Clarify that proxy settings are only applied to extensions

So for me to be able to get access to the extension library I need to use the command code --proxy-server="192.168.80.3:8080;" My settings.xml does not seem to apply anything but includes the following just to make my case. That proxy settings in the xml do not apply. my settings.xml { "http.systemCertificates": false, "http.proxySupport": "off", "http.proxyStrictSSL": false }