+ Always undef the symbols that may have been #define-d
by wincrypt.h after the first inclusion of types.h to
avoid errors from wincrypt.h symbols being used to
compile OpenSSL code
+ Also need to remove #pragma once for this approach to work
+ Define WINCRYPT_USE_SYMBOL_PREFIX to enable wincrypt
symbol prefix at some point in future
Fixes#9981
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/18131)
