WAC: getWac() incorrectly shows permissions that are not inherited.

[mrkvon]

This is related to #83, but distinct issue.

I have a leaf resource (within a container — maybe this doesn't matter), both without their own .acl, and this is within another container with its own .acl:

<#public>
    a acl:Authorization;
    acl:agentClass foaf:Agent;
    acl:accessTo <./>;
    acl:mode acl:Read.

<#owner> <some> <rdf>.

Please note the lack of <#public> acl:default <./>., which makes this rule not inherited by child resources.

When I getWac() on the leaf resource, I receive this WacRule:

{
  public: { read: true, write: false, append: false, control: false },
  agent: { myWebId: { read: true, write: true, append: false, control: true } },
  authenticated: { read: false, write: false, append: false, control: false }
}

but I'd expect it to be

{
  public: { read: ==>false<==, write: false, append: false, control: false },
  ...the rest is the same
}

because it doesn't inherit the public readability from its ancestor container.