-* let http_info.request.url be a php_url
* let the message body be a simple query string unless files are added
* php_http_message_serialize reverses the chain twice; remove that
-* revisit error handling
- * ditch http\Object
- * interfacize http\Exception
- * subclass Exceptions
- * zend_throw_exception
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+* CURLOPT_PROXY_HEADER and CURLOPT_HEADEROPT
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