newClient must prepend scheme to default host

this updates newClient to prepend the scheme https to the default host
found in the global config, and only use said host when both the user
and host are configured

api/api.go

@@ -34,8 +34,8 @@ func newClient(c *cli.Context) (*writeas.Client, error) {
 	}
 	if host := HostURL(c); host != "" {
 		clientConfig.URL = host + "/api"
-	} else if cfg.Default.Host != "" {
-		clientConfig.URL = cfg.Default.Host + "/api"
+	} else if cfg.Default.Host != "" && cfg.Default.User != "" {
+		clientConfig.URL = "https://" + cfg.Default.Host + "/api"
 	} else if config.IsDev() {
 		clientConfig.URL = config.DevBaseURL + "/api"
 	} else if c.App.Name == "writeas" {