pub fn parse_backend(backend: &str) -> Result<(String, u16), ProxyError>Expand description
Parse a backend into (host, port).
Accepts either a URL with an explicit or scheme-default port
(http://127.0.0.1:3000, https://host) or a bare host:port
(127.0.0.1:3000). The passthrough connects to this TCP endpoint directly;
any URL path is irrelevant to a byte-level proxy and is ignored.