Version 1.5.3 fixes nasty SIGHUP bug, please look at https://www.nlnetlabs.nl/bugs-script/show_bug.cgi?id=647 Bump seems trivial, running from local overlay without issues. Reproducible: Always
*unbound-1.5.3 (04 May 2015) 04 May 2015; Ian Delaney <idella4@gentoo.org> +unbound-1.5.3.ebuild: bump wrt bug #546450