### Issue description This part of the code ( https://github.com/apache/apisix/blob/master/apisix/plugins/limit-req.lua#L70-L80) can be replaced with "`local key = (ctx.var[conf.key] or "") .. ctx.conf_type .. ctx.conf_version`" .
Issue description
This part of the code ( https://github.com/apache/apisix/blob/master/apisix/plugins/limit-req.lua#L70-L80)
can be replaced with "
local key = (ctx.var[conf.key] or "") .. ctx.conf_type .. ctx.conf_version" .