http.systemCertificates requires window reload

[kieferrm]

Testing #71108.

Following the steps in the test item, once I'm in a state at which the extension receives data from the server, unchecking http.systemCertificates has no effect. I need to reload the window to make the extension through an error again.

[chrmarti]

On Windows and Mac I'm just adding to the root CAs built-in to Node.js (there seemed to be no good way to read all CAs from the OS). The method of adding CAs appears to store these in a static way, so a window reload becomes necessary to remove them (this is in Node.js native code).

I'm documenting this limitation in the setting's description for now.