Add dingtalk webhook (#2777)

* add dingtalk webhook type

* add vendor

* some fixes

* fix name check

* fix name check & improvment

modules/auth/repo_form.go

@@ -222,6 +222,17 @@ func (f *NewDiscordHookForm) Validate(ctx *macaron.Context, errs binding.Errors)
 	return validate(errs, ctx.Data, f, ctx.Locale)
 }
 
+// NewDingtalkHookForm form for creating dingtalk hook
+type NewDingtalkHookForm struct {
+	PayloadURL string `binding:"Required;ValidUrl"`
+	WebhookForm
+}
+
+// Validate validates the fields
+func (f *NewDingtalkHookForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
+	return validate(errs, ctx.Data, f, ctx.Locale)
+}
+
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