#6444 Handle ACL responses where all permissions for a client are returned, rather than just the single permission requested

[Anonymous]

Originally created by: mononym

What would you like to be added/modified:

This is a paired down request based on issue [#2254]

Enhance ACL handling so that responses, from HTTP or SQL DB's for example, with multiple results for a single client can handle and cache the full result rather than just the single permission requested.

Why is this needed:

For external ACL verification and especially in the case where there are a large number of permissions to be concerned about this would help reduce the number of round trips made when new topics are used in a client request.