prevent PHP from magically setting a 302 header, see http://www.php.net/manual/en/function.header.php
feature #9365 prevent PHP from magically setting a 302 header (lsmith77)

This PR was merged into the master branch.

Discussion
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prevent PHP from magically setting a 302 header

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | yes (for people relying on getting a magic 302 when setting a Location header)
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

this needs a test case .. but first let me know if you are ok with this change.
see http://www.php.net/manual/en/function.header.php

Commits
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c140d4f prevent PHP from magically setting a 302 header, see http://www.php.net/manual/en/function.header.php