In high RPS environments, the default listen backlog is not sufficient, so
giving users the power to configure it is the right approach, especially
since it requires only minor modifications to the code.
Add support for listen(2) backlog definition
Merge branch '2.6' of https://github.com/antirez/redis into 2.6
Why not put the comment in the configuration file?
Added in d76aa96 (renamed to tcp-backlog later)