Upload validator should be able to handle array of arrays returned by ServerRequestInterface::getUploadedFiles

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Feature Request

Q	A
New Feature	yes
RFC	no
BC Break	no

Summary

Currently (I guess since version 2.11.0), the Upload validator can accept an array of UploadedFileInterface instances, but not an array of arrays of UploadedFileInterface instances. The latter is returned by ServerRequestInterface::getUploadedFiles if "array-indicating" file identifiers are used as multipart form parameter names (e.g. "file[]").

Note that the two variants can probably appear in a mixed fashion, i.e. the array returned by ServerRequestInterface::getUploadedFiles would contain both UploadedFileInterface instances and arrays of UploadedFileInterface instances.

[icetee]

The UploadFile validator only one file accepted. Maybe the problem is in the following place:
https://github.com/laminas/laminas-inputfilter/blob/2.23.x/src/FileInput.php#L181