Default value for maxconn in the context of a proxy is 2000 and is
unrelated to any other value (like global ulimit-n or global
maxconn). Without an explicit a user may think that the default value
is either no limit or equal to the global maxconn value.
are not sized to accept such loads, and for this reason it is generally wise
to assign them some reasonable connection limits.
+ By default, this value is set to 2000.
+
See also : "server", global section's "maxconn", "fullconn"