Fix building with OpenSSL on Windows with non-source layout.

* SConstruct:
   - Fix the OpenSSL include path.
   - Add required include headers to OpenSSL feature tests.

git-svn-id: https://svn.apache.org/repos/asf/serf/trunk@1833227 13f79535-47bb-0310-9956-ffa450edef68
1 file changed