<blockquote>going to be standardized</blockquote>
"standardized method" is the one that defined by the one and holy RFC 2616, but i get your confusion now, i will add this remark in the next rebase.
<blockquote>s/XHR/IE&lt;9 XHR.</blockquote> This code path is chosen only for IE implementation i.e. environment that does have `ActiveXObject`, `XHR` object was introduced in IE7, so `IE<9 XHR` would be incorrect, plus there already `Support:` comment above, but i suppose `IE7-8` instead of `IE8` would make more sense.