Add possibility to record branch or tag information in an issue (#780)

modules/auth/repo_form.go

@@ -194,6 +194,7 @@ func (f *NewSlackHookForm) Validate(ctx *macaron.Context, errs binding.Errors) b
 type CreateIssueForm struct {
 	Title       string `binding:"Required;MaxSize(255)"`
 	LabelIDs    string `form:"label_ids"`
+	Ref         string `form:"ref"`
 	MilestoneID int64
 	AssigneeID  int64
 	Content     string