Update docs

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1508856 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55314
Provide a configuration option to bypass the specification restriction on not being able to add endpoints prgrammatically once the first endpoint has started a handshake.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1508872 13f79535-47bb-0310-9956-ffa450edef68