Default protocol is inconsistent with Node's.

If not specified, http-browserify sets the protocol to `window.location.protocol`. This differs from the behavior of Node (see https://nodejs.org/api/http.html#http_http_request_options_callback ). I assume the reasoning was to make https requests if the current location is also https (but I could be wrong here).

Does it make sense to mimic Node's behavior exactly, and just default to http: ?

The issue I'm running into is when running a script locally in the browser, so the protocol is "file:". http-browserify then tries to make file:// requests, which obviously fail.