Your forgot the Maxconn setting when compiling.
Try that
https://webcache.googleusercontent.com/search?q=cache:AAbyx6AyfsQJ:https://searchcode.com/codesearch/view/36787813/+&cd=7&hl=en&ct=clnk&gl=us
Line 668.
: --with-maxconn[=ARG] optionally set the maximum connections the core can handle (default: 16384) NOT USED YET - EXPERIMENTAL