Remove the notExistingPath check and use proper lazy streams

[Matyrobbrt]

The != notExistingPath doesn't do anything, and the newDirStream method would accumulate the results in a list, which is not efficient for dir streams that early-exit. Streams are meant to be lazy.

[marchermans]

@cpw This was your code path, and I am trying to understand why it exists. Is there a reason why this uses a custom path?

[Matyrobbrt]

@cpw This was your code path, and I am trying to understand why it exists. Is there a reason why this uses a custom path?

The custom path is left-over code from the initial implementation, when a path filter that wouldn't match will return the notExistingPath. The whole concept has since been abandoned, with non-valid paths simply being skipped. The notExistingPath is safe to remove now.

[Technici4n]

Note: just tested this on ATM9, loads fine as expected.