func (h *RequestHeader) SetHost(host string) {
	h.parseRawHeaders()
	h.host = append(h.host[:0], host...)
}
func (h *RequestHeader) SetHost(host string) {
	h.parseRawHeaders()
	h.host = append(h.host[:0], host...)
}
func ( h * RequestHeader ) SetHost ( host string ) { h . parseRawHeaders ( ) h . host = append ( h . host [ : 0 ] , host ... ) }
// SetHost sets Host header value.
SetHost sets Host header value .