Various related (un)deploy improvements including:

      - better handling of failed (un)deployment
 - adding checking for valid zip file entries that don't make sense in a WAR file
 - improved validation of WAR file names
 - make sure error messages match the action
 - the return from File.getCanonicalPath() may or may not return a final separator for directories

This fixes CVE-2009-2693, CVE-2009-2901 & CVE-2009-2902

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@892795 13f79535-47bb-0310-9956-ffa450edef68