ContextPolicy.toString() should be improved

ContextPolicy.toString() method, which is used for instance by DelegatingPolicy.listContextPolicies(), should return more valid (XML-like) output. There are missing right quotes for permission type attribute in UncheckedPermissions and RolePermissions sections.

I would also use only a class name (getClass().getName()) as a value for permission type, so it's

<Permission type='javax.security.jacc.WebUserDataPermission' name='/' actions='null' />

instead of

<Permission type='class javax.security.jacc.WebUserDataPermission' name='/' actions='null' />