msvc: OpenSSL 1.1.x support

msvc: OpenSSL 1.1.x support

Since we release Windows client with OpenSSL 1.1.0
(and will switch to 1.1.1 in the next release),
it makes sense to use a newer version in VS build.

This patch adds msvc-specific defines which imply
that underlying OpenSSL is 1.1.x (works with 1.1.0 and 1.1.1).

Also OpenSSL library names in project file are updated.

Signed-off-by: Lev Stipakov <lstipakov@gmail.com>
Acked-by: Simon Rozman <simon@rozman.si>
Message-Id: <1571315023-17044-1-git-send-email-lstipakov@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg18948.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>