AppVeyor: add WinSSL builds
Use the oldest and latest Windows SDKs for them. Also, remove all but one OpenSSL build. Closes https://github.com/curl/curl/pull/3104
Please register or sign in to comment
Use the oldest and latest Windows SDKs for them. Also, remove all but one OpenSSL build. Closes https://github.com/curl/curl/pull/3104