Fix to SubjectAltNames support check - should only be enabled if pyasn1 is installed.
Fix to SubjectAltNames support check - should only be enabled if pyasn1 is installed.

git-svn-id: d3a14f6db1bfe3de60910ef1e675b05aab16cd18@8206 051b1e3e-aa0c-0410-b6c2-bfbade6052be

Gu1/ndg_httpsclient,Gu1/ndg_httpsclient