add doc

@@ -10,7 +10,7 @@ const TYPE = require('../type');
 const MOBILE_DOMAIN = '//item.m.yohobuy.com';
 
 module.exports = [
-    // 商品详情页老链接
+    // 商品详情页老链接，形式一
     {
         type: TYPE.redirect,
         origin: /^\/product\/pro_([\d]+)_([\d]+)\/(.*).html(.*)/,
@@ -20,6 +20,7 @@ module.exports = [
         }
     },
 
+    // 商品详情页老链接，形式二
     {
         type: TYPE.redirect,
         origin: /^\/product\/pro_([\d]+)(.*)/,

@@ -10,13 +10,14 @@ const helpers = global.yoho.helpers;
 const TYPE = require('../type');
 
 module.exports = [
-    // 商品详情页老链接
+    // 商品详情页老链接，形试一
     {
         type: TYPE.redirect,
         origin: /^\/product\/pro_([\d]+)_([\d]+)\/(.*).html(.*)/,
         target: (req, match, p1, p2, p3, p4) => helpers.urlFormat(`/p${p1}.html${p4}`, null, 'item')
     },
 
+    // 商品详情页老链接，形式二
     {
         type: TYPE.redirect,
         origin: /^\/product\/pro_([\d]+)(.*)/,
@@ -30,6 +31,7 @@ module.exports = [
         target: req => helpers.urlFormat(req.url, null, 'item')
     },
 
+    // 品牌一览
     {
         type: TYPE.redirect,
         origin: /\/brands\?.*channel=(boys|girls|kids|lifestyle)/,
@@ -42,6 +44,7 @@ module.exports = [
         }
     },
 
+    // 品牌一览专题
     {
         type: TYPE.redirect,
         origin: (req) => req.path === '/brands/plusstar',