include raw http header string in the response as well

composer.json

@@ -12,7 +12,7 @@
   ],
   "require": {
     "indieweb/link-rel-parser": "0.1.*",
-    "mf2/mf2": "0.3.*"
+    "mf2/mf2": ">=0.3.2"
   },
   "autoload": {
     "psr-4": {

src/p3k/HTTP.php

@@ -73,7 +73,6 @@ class HTTP {
     // Parses the HTTP headers and adds the "headers" and "rels" response keys
     $response['headers'] = self::_parse_headers($response['header']);
     $response['rels'] = \IndieWeb\http_rels($response['header']);
-    unset($response['header']);
     return $response;
   }
 

src/p3k/HTTP/Test.php

@@ -45,6 +45,7 @@ class Test implements Transport {
     $response = $this->_read_file($url);
     return [
       'code' => (int)$response['code'],
+      'header' => $response['header'],
       'headers' => $response['headers'],
       'rels' => $response['rels'],
       'error' => '',
@@ -88,6 +89,7 @@ class Test implements Transport {
       } else {
         return [
           'code' => 0,
+          'header' => $headers,
           'headers' => $parsedHeaders,
           'rels' => \IndieWeb\http_rels($headers),
           'body' => $body,
@@ -102,6 +104,7 @@ class Test implements Transport {
 
     return [
       'code' => (int)$code,
+      'header' => $headers,
       'headers' => $parsedHeaders,
       'rels' => \IndieWeb\http_rels($headers),
       'body' => $body,