Tomcat Mutual Authentication

This worked: https://sites.google.com/site/paratumignempetere/software-development/security/mutually-authenticated-secure-socket-layer

Initially was following http://www.maximporges.com/2009/11/18/configuring-tomcat-ssl-clientserver-authentication/ but it used an outdated version of HttpClient.

This also looks interesting: https://github.com/skprasadu/enable-ssl-in-tomcat