ZF-6933: Support proxy options in Zend_Http_Client_Adapter_Curl

Description

Zend_Http_Client_Adapter_Curl can be modified to be a drop-in replacement for the Zend_Http_Client_Adapter_Proxy by supporting the following configuraiton options in the ->setConfig:

    'proxy_host'    => '',
    'proxy_port'    => 8080,
    'proxy_user'    => '',
    'proxy_pass'    => '',
    'proxy_auth'    => Zend_Http_Client::AUTH_BASIC,

ssl_transport and persistent can be ignored in this case.

Comments

Implemented in trunk, will be included in 1.9.