api/webhook.go
func webhookList(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	ctxs := permission.ContextsForPermission(t, permission.PermWebhookRead, permTypes.CtxTeam)
	var teams []string
	for _, c := range ctxs {
		if c.CtxType == permTypes.CtxGlobal {
			teams = nil
			break
		}
		teams = append(teams, c.Value)
	}
	webhooks, err := servicemanager.Webhook.List(teams)
	if err != nil {
		return err
	}
	if len(webhooks) == 0 {
		w.WriteHeader(http.StatusNoContent)
		return nil
	}
	w.Header().Set("Content-Type", "application/json")
	return json.NewEncoder(w).Encode(webhooks)
}
func webhookList(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	ctxs := permission.ContextsForPermission(t, permission.PermWebhookRead, permTypes.CtxTeam)
	var teams []string
	for _, c := range ctxs {
		if c.CtxType == permTypes.CtxGlobal {
			teams = nil
			break
		}
		teams = append(teams, c.Value)
	}
	webhooks, err := servicemanager.Webhook.List(teams)
	if err != nil {
		return err
	}
	if len(webhooks) == 0 {
		w.WriteHeader(http.StatusNoContent)
		return nil
	}
	w.Header().Set("Content-Type", "application/json")
	return json.NewEncoder(w).Encode(webhooks)
}
// title: webhook list
// path: /events/webhooks
// method: GET
// produce: application/json
// responses:
//   200: List webhooks
//   204: No content