func (h *RequestHeader) AddBytesK(key []byte, value string) {
	h.Add(b2s(key), value)
}
func (h *RequestHeader) AddBytesK(key []byte, value string) {
	h.Add(b2s(key), value)
}
func ( h * RequestHeader ) AddBytesK ( key [ ] byte , value string ) { h . Add ( b2s ( key ) , value ) }
// AddBytesK adds the given 'key: value' header.
//
// Multiple headers with the same key may be added with this function.
// Use SetBytesK for setting a single header for the given key.
AddBytesK adds the given key : value header . Multiple headers with the same key may be added with this function . Use SetBytesK for setting a single header for the given key .