use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), c->underlying_host) &&
proxy_path && av_strstart(proxy_path, "http://", NULL);
use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), c->underlying_host) &&
proxy_path && av_strstart(proxy_path, "http://", NULL);