excludeHostsForProxy - Variable should support trailing domain names

[salvisbh]

Currently the proxy configuration only allows a "stupid" list of hostnames for which the communication should be established without a proxy.

Example:

"rest-client.excludeHostsForProxy": [
        "127.0.0.1",
        "localhost",
        "mydomain.com"
    ]

Wildcards for domain suffixes do not seem to be possible. In large environments this means that for each subdomain or server an entry in settings.json must be explicitly added.

Lines 300 to 314 in httpClient.ts document this behavior.

       for (const eh of excludeHostsProxyList) {
            const urlParts = eh.split(":");
            if (!port) {
                // if no port specified in request url, host name must exactly match
                if (urlParts.length === 1 && urlParts[0] === hostName) {
                    return true;
                }
            } else {
                // if port specified, match host without port or hostname:port exactly match
                const [ph, pp] = urlParts;
                if (ph === hostName && (!pp || pp === port)) {
                    return true;
                }
            }
        }

It would be desirable to be able to use the same rules for trailing_domain as in the underlying chromium framework.

Extract from the documentation:

--proxy-bypass-list=(|)[:][;...]

This tells chrome to bypass any specified proxy for the given semi-colon-separated list of hosts. This flag must be used (or rather, only has an effect) in tandem with --proxy-server. Note that trailing-domain matching doesn't require "." separators so "*google.com" will match "igoogle.com" for example.

--- end documentation extract

This problem is closely related to the vscode issue Extension proxy support #12588

[Huachao]

@salvisbh one question, what's the setting of your setting http.proxySupport?