config-msvc.h: indicate key material export support

config-msvc.h: indicate key material export support

MSVC build uses OpenSSL from vcpkg, which at the moment
is 1.1.1l. Key material export was added to 1.1.1, so it is safe
to indicate its support unconditionally.

This enables Windows releases to benefit from tls-ekm
data channel keys derivation.

Signed-off-by: Lev Stipakov <lev@openvpn.net>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20211213135253.212-1-lstipakov@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg23394.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>