Ticket #47377 - make listen backlog size configurable
https://fedorahosted.org/389/ticket/47377
Reviewed by: nkinder (Thanks!)
Branch: 389-ds-base-1.2.11
Fix Description: Add the attribute nsslapd-listen-backlog-size - this controls
the listening socket connection backlog maximum size. This corresponds to
the backlog parameter of the listen() system call. The default value is 128.
Platforms tested: RHEL6 x86_64
Flag Day: no
Doc impact: yes - need to doc the new attribute