Fix issue with cookies with no "=" (#92)

Author: nrwiersma

Diff for: Bridges/HttpKernel.php

@@ -138,6 +138,9 @@ protected function mapRequest(ServerRequestInterface $psrRequest)
             $cookies = explode(';', $cookieHeader);
 
             foreach ($cookies as $cookie) {
+                if (strpos($cookie, '=') == false) {
+                    continue;
+                }
                 list($name, $value) = explode('=', trim($cookie));
                 $_COOKIE[$name] = $value;