public void
setEDNS(int level, int payloadSize, int flags, List options) {
	for (int i = 0; i < resolvers.size(); i++)
		((Resolver)resolvers.get(i)).setEDNS(level, payloadSize,
						     flags, options);
}
Creates a new Extended Resolver
@param res An array of pre-initialized Resolvers is provided.
@see SimpleResolver
@exception UnknownHostException Failure occured initializing SimpleResolvers
src/main/java/core/org/xbill/DNS/ExtendedResolver.java