code: public void set(String name, String value) {
  		HttpHeader header = get(name);
  		if(header == null) {
  			add(name,value);
  		} else {
  			header.setValue(value);
  		}
  	}
docs: Add a new Header with the given name/value, or replace an existing value
  if a Header already exists with name
  
  @param name
  @param value