Get rid of old OpenSSL workarounds.

Get rid of old OpenSSL workarounds.

We now only support OpenSSL 0.9.8+, so we don't have to work around the bug
in 0.9.6b anymore.  Also, OBJ_txt2nid() now takes a const char * (instead
of a char *), so we no langer have to cast away const.

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1425592716-14243-1-git-send-email-steffan@karger.me>
URL: http://article.gmane.org/gmane.network.openvpn.devel/9512
Signed-off-by: Gert Doering <gert@greenie.muc.de>