[HttpFoundation] fixed, overwritten CONTENT_TYPE
[HttpKernel] added a unit for the previous commit (closes #7025)
merged branch fabpot/request-create-fix (PR #7098)

This PR was merged into the 2.2 branch.

Commits
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738de9a [HttpKernel] added a unit for the previous commit (closes #7025)
d0e4b76 [HttpFoundation] fixed, overwritten CONTENT_TYPE

Discussion
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Fixed content type when passed as a server value

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7025
| License       | MIT
| Doc PR        | n/a

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by stof at 2013-02-17T14:51:35Z

:+1: