Add SSL library version reporting.

Print the version of the SSL and LZO library (if any) used.

SSL library version is also sent as IV_SSL=<version> to the server if
--push-peer-info is enabled.

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <20140416152456.GI16637@greenie.muc.de>
URL: http://article.gmane.org/gmane.network.openvpn.devel/8537
(cherry picked from commit 1ec984b154aa3247ef58c9d44e7e477880b632b1)