Fixes for Indigenous

- Don't use "uid", but "channel"
- Don't update with name is empty string

pkg/client/requests.go

@@ -244,7 +244,7 @@ func (c *Client) ChannelsCreate(name string) (microsub.Channel, error) {
 func (c *Client) ChannelsUpdate(uid, name string) (microsub.Channel, error) {
 	args := make(map[string]string)
 	args["name"] = name
-	args["uid"] = uid
+	args["channel"] = uid
 	res, err := c.microsubPostRequest("channels", args)
 	if err != nil {
 		return microsub.Channel{}, err

pkg/server/microsub.go

@@ -140,7 +140,7 @@ func (h *microsubHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 					return
 				}
 				respondJSON(w, channel)
-			} else {
+			} else if name != "" {
 				channel, err := h.backend.ChannelsUpdate(uid, name)
 				if err != nil {
 					http.Error(w, err.Error(), 500)