Fix IHTTPResult::getHeader/s()

- Split functionality "getHeader()" and "getHeaders()" analog to IMessageInterface::getHeader/s()
- Fix functionality at various places - Adapt CurlResultTest

src/Network/HTTPRequest.php

@@ -493,8 +493,7 @@ class HTTPRequest implements IHTTPRequest
 				'timeout'        => $timeout,
 				'accept_content' => $accept_content,
 				'cookiejar'      => $cookiejar
-			],
-			$redirects
+			]
 		);
 	}