Correct the previous fix for bug 56825 that enabled pre-emptive authentication to work with the SSL authenticator.
An SSL handshake is now triggered if:
- premetive authentication is enabled;
- CLIENT-CERT is being used; and
- the previous handshake did not include a client cert

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1622470 13f79535-47bb-0310-9956-ffa450edef68