dns/unbound: Import patch to fix hostname verification with OpenSSL 1.0.2

PR: 235571
Approved by: Jaap Akkerhuis <jaap@NLnetLabs.nl> (maintainer)
Obtained from: https://www.nlnetlabs.nl/bugs-script/show_bug.cgi?id=4206#c5

		https://github.com/pfsense/FreeBSD-ports/commit/af2c493a0dfa99e2afc6e3f9236aad10021d6b39

Sponsored by: Rubicon Communications, LLC (Netgate)