Support patterns in RegKey references

When specifying registry locations in custom ccleaner entries (whether in winapp1.ini or winapp2.ini), it would be useful to be able to use patterns like we can in FileKeyN specs.

Feel free to think of this as two severable requests, which I'll list in order of importance to me:

  1. Support patterns in the value mask. (Note that this would make it possible to empty a key without deleting the key itself, behavior that is not currently possible but which might be necessary for certain applications and/or security environments.)
  2. Support patterns in the key name

Thanks.