Zend\Http\Response\PhpEnvironment#sendHeaders() silently returns - should scream and burn and demand for human sacrifices instead

[weierophinney]

https://github.com/zendframework/zend-http/blob/b382c6e068a2d9c87b7cf0dfe78c6dd19e4ff197/src/PhpEnvironment/Response.php#L84

To reproduce (sorry if I couldn't do it myself right away - needs a @runInSeparateProcess test):

$response = new \Zend\Http\Response\PhpEnvironment();

echo 'foo;
ob_flush();

// expect an exception here
$response->sendHeaders();

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Originally posted by @Ocramius at zendframework/zend-http#138

[samsonasik]

@Ocramius I created PR #41 for it.