upstream to github. PR: 200537 Approved by: maintainer MFH: 2015Q2 (test)
* Add patch to use TCP_KEEP{CNT, IDLE, INTVL, ALIVE} [2] Changes: http://pgfoundry.org/forum/forum.php?forum_id=1885 PR: ports/169463 [1] Submitted by: Dmitry <dmitry2004@yandex.ru> [1], Oleg A. Mamontov <oleg@mamontov.net> [2]