kea: Fix compilation without deprecated OpenSSL APIs

Forgot to add this one to the last pull request.

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

net/kea/patches/010-openssl-deprecated.patch

@@ -0,0 +1,11 @@
+--- a/src/lib/cryptolink/openssl_link.cc
++++ b/src/lib/cryptolink/openssl_link.cc
+@@ -79,7 +79,7 @@ CryptoLink::initialize() {
+ 
+ std::string
+ CryptoLink::getVersion() {
+-    return (SSLeay_version(SSLEAY_VERSION));
++    return (OpenSSL_version(OPENSSL_VERSION));
+ }
+ 
+ } // namespace cryptolink