[http] Normalize Content-Transfer-Encoding

[Maks3w]

Appply the same changes as #5598 for to have the value normalized with lowercase

[denis-sokolov]

Is there a reason to, though?
The current implementation is fully conforming to the spec, and with getFieldValue not promising any normalization in the (missing) API documentation, the implementation also does not contradict the documentation.

In any case, here's a relevant RFC page.

[Maks3w]

@denis-sokolov this header is case insensitive so the correct way to deal with a mix of lower and upper cases is to have all in the same way.

PD: The RFC of your link is not related since is for MIME and not HTTP.

[god107]

Hello! Can anyone check that my fix is valid and say if i can send pull request?
https://github.com/god107/zf2/commit/1ab412bfd012111fcf9a5414ebfcb8b20b32237a

[denis-sokolov]

@god107, you should definitely remove the @todo line in the same commit.
Other than that, looks good.

[god107]

I've fixed this:
https://github.com/god107/zf2/commit/2e4e8dd5879810a9f5e66f4356c7b2101e918809

What about writing test?

[god107]

Now it should be done right.