add comments for wechat cert sync

 ---
-#  switch java inner upstream to aws
+# sync wechat cert.
+# local cert dir: ~/.cert/wechatpay
 
 - hosts: java-order, java-ufo-fore, java-extendstore
 

@@ -51,6 +51,8 @@ git push
 |yoho.dns.mysql_read_to_master| MySQL数据库读切换到主库。Note: 切换后需要reload cobar|
 |java-rsyslog| 同步java服务的rsyslog客户端配置|
 |java.inner.switch| 修改`api.yoho.cn` 流量部分到`aws`|
+|wechat.cert.sync| 同步微信支付证书|
+
 ## `hashicorp vault` 配置
 
 > Why: credentials 信息统一管理

@@ -157,7 +157,7 @@ function forbid_ua()
     local ua = http_request.get_ua()
     for i = 1, #forbid_ua_table  do
       if ua and string.find(ua, forbid_ua_table[i]) then
-         ngx.log(ngx.ERR, "[User-Agent Not Allowed]", ua)
+         ngx.log(ngx.ERR, "[User-Agent Not Allowed]: ", ua)
          ngx.exit(ngx.HTTP_OK)
       end
     end