vendor: update github.com/go-macaron/captcha

[CI SKIP]

README.md

@@ -50,7 +50,7 @@ The goal of this project is to make the easiest, fastest, and most painless way
 - Gravatar and Federated avatar with custom source
 - Mail service
 - Administration panel
-- Supports MySQL, PostgreSQL, SQLite3, MSSQL and [TiDB](https://github.com/pingcap/tidb) (experimental)
+- Supports MySQL, PostgreSQL, SQLite3, MSSQL and [TiDB](https://github.com/pingcap/tidb) (via MySQL protocol)
 - Multi-language support ([23 languages](https://crowdin.com/project/gogs))
 
 ## Hardware Requirements

README_ZH.md

@@ -31,7 +31,7 @@ Gogs 的目标是打造一个最简单、最快速和最轻松的方式搭建自
 - 支持 Jupyter Notebook
 - 支持邮件服务
 - 支持后台管理面板
-- 支持 MySQL、PostgreSQL、SQLite3、MSSQL 和 [TiDB](https://github.com/pingcap/tidb)（实验性支持） 数据库
+- 支持 MySQL、PostgreSQL、SQLite3、MSSQL 和 [TiDB](https://github.com/pingcap/tidb)（通过 MySQL 协议）数据库
 - 支持多语言本地化（[23 种语言]([more](https://crowdin.com/project/gogs))）
 
 ## 硬件要求

vendor/github.com/go-macaron/captcha/captcha.go

@@ -68,7 +68,7 @@ func (c *Captcha) CreateHtml() template.HTML {
 		panic(fmt.Errorf("fail to create captcha: %v", err))
 	}
 	return template.HTML(fmt.Sprintf(`<input type="hidden" name="%s" value="%s">
-	<a class="captcha" href="javascript:">
+	<a class="captcha" href="javascript:" tabindex="-1">
 		<img onclick="this.src=('%s%s%s.png?reload='+(new Date()).getTime())" class="captcha-img" src="%s%s%s.png">
 	</a>`, c.FieldIdName, value, c.SubURL, c.URLPrefix, value, c.SubURL, c.URLPrefix, value))
 }

vendor/vendor.json

@@ -75,10 +75,10 @@
 			"revisionTime": "2015-10-13T08:11:02Z"
 		},
 		{
-			"checksumSHA1": "ifjG+PNGY7+sNm3WoA3UntmUTa4=",
+			"checksumSHA1": "kWnClaQsy/2YLvx2SrSUGgSyhzk=",
 			"path": "github.com/go-macaron/captcha",
-			"revision": "8aa5919789ab301e865595eb4b1114d6b9847deb",
-			"revisionTime": "2015-11-23T22:51:53Z"
+			"revision": "a9d45b762e2537878323cd8a4147644378f09be1",
+			"revisionTime": "2017-03-28T22:26:02Z"
 		},
 		{
 			"checksumSHA1": "i52HJHpyI3avut3QAIrrD0h7gmY=",