private boolean isUniqueLocalAddress(InetAddress inetAddress) {
		byte[] ip = inetAddress.getAddress();
		return (ip[0] & 0xff) == 0xfd;
	}
If the address is Unique Local Address.

@param inetAddress {@link InetAddress}
@return {@code true} if the address is Unique Local Address, otherwise {@code false}
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-discovery/src/main/java/com/alibaba/cloud/nacos/util/InetIPv6Utils.java