ServerMessage.setRedirect

void setRedirect(uint statusCode, string redirectUri)

Sets msg's status_code to status_code and adds a Location header pointing to redirect_uri. Use this from a classServer when you want to redirect the client to another URI.

redirect_uri can be a relative URI, in which case it is interpreted relative to msg's current URI. In particular, if redirect_uri is just a path, it will replace the path

and query of msg's URI.

Parameters

`statusCode`	a 3xx status code
`redirectUri`	the URI to redirect msg to