object interface for AF_INET6 domain sockets

 IO::Socket::INET6 provides an object interface to create and use sockets
 in the AF_INET6 domain. It is built upon the IO::Socket interface and
 inherits all the methods defined by IO::Socket.
 .
 Please note that IO-Socket-INET6 is considered deprecated. It was succeeded
 by IO::Socket::IP. Please consider converting old code from IO-Socket-INET6
 to IO-Socket-IP.