squash commits
- add Eric Luehrsen as maintainer
- add ldns-example programs as option
- add ECDSA to support DNSSEC zones with these keys
- remove patches included upstream

Signed-off-by: Eric Luehrsen <ericluehrsen@gmail.com>

ENGINE support is needed for GOST, which is already disabled. However, it
is going to be disabled by default in a future update. This fixes the
compilation failure.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Tested with OpenSSL 1.0.2 and 1.1.1

Signed-off-by: Rosen Penev <rosenp@gmail.com>
[minor tweak to add #ifdef HAVE_SSL in host2str.c]
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

CVE-2017-1000231 and CVE-2017-1000232.

Taken from Fedora.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

This version adds compatibility with openssl 1.1.0.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

Fix #2663

Signed-off-by: Konstantin Shalygin <k0ste@cn.ru>
[refresh patch]
Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>