/etc/tomcat6/policy.d/05jspwiki.policy is in jspwiki 2.8.0-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/tomcat6/policy.d/../../jspwiki/tomcat.policy
/etc/tomcat6/policy.d/../../jspwiki/tomcat.policy