First draft of Diagnostics class.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1476959 13f79535-47bb-0310-9956-ffa450edef68
Wire Diagnostics to manager webapp text interface.
Not yet documented.
Wiring for html interface still missing.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1476960 13f79535-47bb-0310-9956-ffa450edef68