* Gate-keeper that controls access to Hudson's model objects.
*
* @author Kohsuke Kawaguchi
* @see <a href="https://wiki.jenkins-ci.org/display/JENKINS/Making+your+plugin+behave+in+secured+Jenkins">Making your plugin behave in secured Jenkins</a>
See: <ahref="https://wiki.jenkins-ci.org/display/JENKINS/Making+your+plugin+behave+in+secured+Jenkins">Making your plugin behave in secured Jenkins</a>