QIF cli not support manual proxy paras and installer got no proxy APIs

We are trying to perform an unattended installation through cli with a local proxy server, but found that the only available cmd para is proxy type(no-proxy and system-proxy),  other hostname, portId, userName and password cannot be specified with cli, which makes unattended installation with manual proxy impossible; 

Plus, installer API does not have any proxy related methods, which makes it hard to customize proxy setting page component if needed.