Topic equalities: 'test/topic/' and 'test/topic' should be the same

At the moment they are not. It is also valid for '/test/topic' and 'test/topic'.

I am not so sure that we should fix this here or in Ascoltatori.
The main reason for handling it in Mosca is to 'fix' the packet, so even in the persistance phase should not be considered again. The other way is I think we should also fix it in Ascoltatori.

@davedoesdev, what do you think?