添加用户鉴权模块

[hanchuanchuan]

实现用户连接的鉴权操作
开启鉴权方法:

• 在 config.toml 配置文件添加以下参数(文件根节点或者[inc]节点)

skip_grant_table = false

添加以下语法支持:

• CREATE USER
• DROP USER
• ALTER USER
• SET PASSWORD FOR
• GRANK/REVOKE 可能用不到
• SELECT * FROM MYSQL.USER 用户查询

默认初始用户为root, 密码为空

忘记密码后可以通过跳过鉴权的方式重新启动, 修改密码后开启鉴权并重启.

[codecov]

Codecov Report

Merging #132 into master will decrease coverage by 0.0071%.
The diff coverage is 0%.

@@               Coverage Diff                @@
##             master       #132        +/-   ##
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- Coverage   60.2303%   60.2232%   -0.0072%     
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  Files           369        369                
  Lines         79865      79916        +51     
================================================
+ Hits          48103      48128        +25     
- Misses        27659      27688        +29     
+ Partials       4103       4100         -3