<notes>* Improved response performance
+ Added "ipresolve" request option
+ Added HTTP_IPRESOLVE_{ANY|V4|V6}, HttpRequest::IPRESOLVE_{ANY|V4|V6} constants
<notes>* Improved response performance
+ Added "ipresolve" request option
+ Added HTTP_IPRESOLVE_{ANY|V4|V6}, HttpRequest::IPRESOLVE_{ANY|V4|V6} constants