HttpResponse class is only available for PHP >= 5.1
+HttpResponse::getHeader() does not work in Apache2 with a PHP version
+lower than 5.1.3 (as mod_php).
+
If you keep getting "SSL connect error" when trying to issue requests on
Windows, try another (newer) libeay32.dll/ssleay32.dll pair.
which ends up in HttpRequestPoolExcepiont::$exceptionStack, in
HttpRequestPool::__construct(); it doesn't happen with wrapped
exceptions in HttpRequestPool::send().
+
+ - our http_urlencode_hash() only handles arrays and does not
+ differentiate between prefixes for numeric or string keys.
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