OpenBSD 5.7 errata: http://www.openbsd.org/errata57.html#015_relayd
015: RELIABILITY FIX: September 28, 2015 All architectures Various problems were identified in relayd and merged back from current to 5.7 in this maintanance update. This patch is for 5.7 only, it fixes reliability problems that where identified during the OpenBSD 5.8 release cycle.