Rename variables for easy reference

pkg/http/client.go

@@ -201,6 +201,7 @@ func (r *HTTPClient) ensureReachableHost(req *http.Request) {
 	if !strings.Contains(req.Host, ".download.real-debrid.") {
 		return
 	}
+	// skip CDN servers
 	if req.Host[0] >= 'a' && req.Host[0] <= 'z' {
 		return
 	}
@@ -216,16 +217,18 @@ func (r *HTTPClient) ensureReachableHost(req *http.Request) {
 	} else if strings.HasSuffix(req.Host, ".cloud") {
 		newHost = strings.Replace(req.Host, ".cloud", ".com", 1)
 	}
+	// check if newHost is reachable
 	if r.CheckIfHostIsReachable(newHost) {
 		req.Host = newHost
 		req.URL.Host = req.Host
 		return
 	}
-
+	// just pick a random host
 	req.Host = r.hosts[rand.Intn(len(r.hosts))]
 	req.URL.Host = req.Host
 }
 
+// CheckIfHostIsReachable checks if the given host is passed in the list of reachable hosts
 func (r *HTTPClient) CheckIfHostIsReachable(reqHost string) bool {
 	for _, host := range r.hosts {
 		if reqHost == host {