db设置读写分离，使用config读取配置文件无法获取配置

[goodluckekin]

Q	A
Bug report?	yes/no
Feature request?	yes/no
Swoft version	x.y.z (by php bin/swoft -V)
Swoole version	x.y.z (by php --ri swoole)
PHP version	x.y.z (by php -v)
Runtime environment	Win10/Mac/CentOS 7/Ubuntu/Docker etc.

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Details

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[sakuraovq]

config 不支持数组里面配置