[Bug][Swoole] Disable unintentional swoole header formatting by config value

[NiroDeveloper]

With this Pull Request i want to fix a bug where Swoole is formatting headers names unintentionally.

Swoole and Open Swoole are formatting headers by default.
https://openswoole.com/docs/modules/swoole-http-response-header

It seems odd that octane calles ResponseHeaderBag's allPreserveCase presumably to preserve the casing.

octane/src/Swoole/SwooleClient.php

Line 156 in d962806

$headers = $response->headers->allPreserveCase();

But few lines later swoole will format it.

octane/src/Swoole/SwooleClient.php

Line 164 in d962806

$swooleResponse->header($name, $value);

The swoole formatting should be adjustable by config, so it could be behave like Laravel and Symfony by default.
This change is backwards compatible, because the default is still "true".

on-behalf-of: @e-solutions-GmbH info@esolutions.de