Provide modifyHandshake() with a per session (i.e. per connection) view of the user properties rather than a per endpoint view (that would be shared will all connections to that endpoint).
This allows for easier configuration of per connection properties from within modifyHandshake()

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1536337 13f79535-47bb-0310-9956-ffa450edef68