Merge branch '5.4' into 5.5

diff --cc wcfsetup/install/files/acp/templates/index.tpl
Simple merge

diff --cc wcfsetup/install/files/acp/templates/packageList.tpl
Simple merge

diff --cc wcfsetup/install/files/lib/system/request/RequestHandler.class.php
index 5dbcb3f313df7c08fbdf60e84baf4ddba80d1fdb,2fd82b5e9407294d6ec766a4cc81f6c462d41796..5547d31c2635c5c79d85f50a0e89fc5b392eec3f
--- 1/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
--- 2/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
+++ b/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
@@@ -114,89 -126,20 +116,103 @@@ class RequestHandler extends SingletonF
          }
      }
  
+     private function checkSystemEnvironment()
+     {
+         if ($this->isACPRequest()) {
+             return;
+         }
+ 
+         if (!(70200 <= PHP_VERSION_ID && PHP_VERSION_ID <= 80099)) {
+             \header('HTTP/1.1 500 Internal Server Error');
+ 
+             throw new NamedUserException(WCF::getLanguage()->get('wcf.global.incompatiblePhpVersion'));
+         }
+     }
+ 
+ 
 +    /**
 +     * Splits the given array of cache-control values at commas, while properly
 +     * taking into account that each value might itself contain commas within a
 +     * quoted string.
 +     */
 +    private function splitCacheControl(array $values): \Iterator
 +    {
 +        foreach ($values as $value) {
 +            $isQuoted = false;
 +            $result = '';
 +
 +            for ($i = 0, $len = \strlen($value); $i < $len; $i++) {
 +                $char = $value[$i];
 +                if (!$isQuoted && $char === ',') {
 +                    yield \trim($result);
 +
 +                    $isQuoted = false;
 +                    $result = '';
 +
 +                    continue;
 +                }
 +
 +                if ($isQuoted && $char === '\\') {
 +                    $result .= $char;
 +                    $i++;
 +
 +                    if ($i < $len) {
 +                        $result .= $value[$i];
 +
 +                        continue;
 +                    }
 +                }
 +
 +                if ($char === '"') {
 +                    $isQuoted = !$isQuoted;
 +                }
 +
 +                $result .= $char;
 +            }
 +
 +            if ($result !== '') {
 +                yield \trim($result);
 +            }
 +        }
 +    }
 +
 +    /**
 +     * @since 5.5
 +     */
 +    private function sendPsr7Response(ResponseInterface $response)
 +    {
 +        // Storing responses in a shared cache is unsafe, because they all contain session specific information.
 +        // Add the 'private' value to the cache-control header and remove any 'public' value.
 +        $cacheControl = [
 +            'private',
 +        ];
 +        foreach ($this->splitCacheControl($response->getHeader('cache-control')) as $value) {
 +            [$field] = \explode('=', $value, 2);
 +
 +            // Prevent duplication of the 'private' field.
 +            if ($field === 'private') {
 +                continue;
 +            }
 +
 +            // Drop the 'public' field.
 +            if ($field === 'public') {
 +                continue;
 +            }
 +
 +            $cacheControl[] = $value;
 +        }
 +
 +        $response = $response->withHeader(
 +            'cache-control',
 +            // Manually imploding the fields is not required as per strict reading of the HTTP standard,
 +            // but having duplicate 'cache-control' headers in the response certainly looks odd.
 +            \implode(', ', $cacheControl)
 +        );
 +
 +        $emitter = new SapiEmitter();
 +        $emitter->emit($response);
 +    }
 +
      /**
       * Builds a new request.
       *

diff --cc wcfsetup/install/lang/de.xml
Simple merge

diff --cc wcfsetup/install/lang/en.xml
Simple merge