symfony: Symfony can't read HTTP headers with dots

Symfony is using $_SERVER superglobal for getting headers. But if we have header like ‘my.custom.header’, the header is converted (probably by most CGI engines) to $_SERVER['HTTP_MY_CUSTOM_HEADER']

$request->heades->hasHeader('my.custom.header') will return false in this case because Symfony normalizes headers only with strtr(strtolower($key), '_', '-')

Probably, the solution may be: use raw php://input instead of $_SERVER superglobal?