Refreshed darwin patch.

The first OpenSSL patch is an upstream backport. The second was sent
upstream: https://github.com/NLnetLabs/ldns/pull/68

Small Makefile cleanups for consistency.

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

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>