Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=57391
Allow TLS Session Tickets to be disabled.
Patch provided by Josiah Purtlebaugh.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1647530 13f79535-47bb-0310-9956-ffa450edef68