Like with FoxyProxy, I want to use proxy in emacs only for URLs that match a specific regexp.
E.g., if the URL matches
\\.ec2\\.internal, I want the
url-proxy-services to be
"ip-10-0-37-237.ec2.internal:8081", otherwise none.
Note that the
no_proxy key works the other way around - it excludes matching URLs from proxy processing, while I want to only include some URLs.