[Feature Request] Change default connection listen backlog to 512

[druchoo]

Per @redbaron in #186 512 is a reasonable default value for connection listen backlog.

..setting it to 512 will do no harm whatsoever, but would make it more reliable against short burst of new incoming connections. setting it to 3 is just silly and have no reason to exist

[grobian]

http://www.linuxjournal.com/files/linuxjournal.com/linuxjournal/articles/023/2333/2333s2.html and
http://veithen.github.io/2014/01/01/how-tcp-backlog-works-in-linux.html
both seem to suggest 512 is not a good default, since 128 appears the default max for Linux. (sysctl net.core.somaxconn tells me at least).

[grobian]

So, perhaps 32 is a bit more conservative default (still much better than 5 if you need it)?

[druchoo]

I'm by no means an expert. So i'll defer to others one this. But anything higher than 5 is probably better.

[grobian]

agreed