修复一堆错误

hydro/handler/user.js

@@ -61,7 +61,8 @@ class UserRegisterHandler extends Handler {
         );
         if (await system.get('smtp.user')) {
             const m = await this.renderHTML('user_register_mail.html', {
-                url: `${await system.get('server.url')}/register/${t[0]}`,
+                path: `register/${t[0]}`,
+                url_prefix: await system.get('server.url'),
             });
             await sendMail(mail, 'Sign Up', 'user_register_mail', m);
             this.response.template = 'user_register_mail_sent.html';