Add 20 second timeout

src/main.rs

@@ -53,6 +53,7 @@ lazy_static! {
         .danger_accept_invalid_certs(true) // because some certs are out of date
         .user_agent("curl/7.54.0") // so some sites (e.g. sciter.com) don't reject us
         .redirect(Policy::none())
+        .timeout(time::Duration::from_secs(20))
         .build().unwrap();
 
     // This is to avoid errors with running out of file handles, so we only do 20 requests at a time