OpenSSL 1.1 patch from NetBSD pkgsrc/mail/imap-uw
...
$NetBSD: patch-src_osdep_unix_ssl__unix.c,v 1.2 2018/04/16 21:27:57 christos Exp$
Description: Support OpenSSL 1.1
When building with OpenSSL 1.1 and newer, use the new built-in
hostname verification instead of code that doesn't compile due to
structs having been made opaque.
Bug-Debian: https://bugs.debian.org/828589
HIROSE Yuuji
committed
on 7 May