merge revision(s) 35865:
* lib/ipaddr.rb: Inhibit zero-filled octets in an IPv4 address in all platforms. [ruby-dev:45671] * lib/ipaddr.rb: Allow the x:x:x:x:x:x:d.d.d.d form not limited to IPv4 mapped/compatible addresses. This change also makes it possible for the parser to understand IPv4 mapped and compatible IPv6 addresses in non-compressed form. * lib/ipaddr.rb: Stop exposing IPSocket.valid*? methods which were only usable on non-IPv6-ready platforms.