make it run on windows

[arademaker]

possible changing the default backend of request.el

[odanoburu]

possible changing the default backend of request.el

did you have any problems with it? request.el will use url.el if curl is not available, so it should be portable.

[hmuniz]

Yes, request.el will use url.el if curl is not available. But Windows has a curl version available that we cannot trust. So it is important windows users customize the variable request-backend .