IetfInetUtil conversion from byte[] and InetAddress returns a different implementation of Ipv4Address

Since InetAddress and byte[] do not semantically hold a zone, the utilities return the more-strictly validated subclass of Ip{v4,v6,}Address, Ip{v4,v6,}AddressNoZone.

Projects that require an Ip{v4,v6}Address instance rather than any subclass of it, need to re-wrap the result through one of the copy constructors.