* ext/socket/socket.c (Init_socket): IPv6 is not supported although

AF_INET6 is defined on MinGW.

* lib/ipaddr.rb (AF_INET6): workaround in the environment which does
  not support IPv6.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5187 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/ipaddr.rb

@@ -32,6 +32,18 @@
 
 require 'socket'
 
+unless Socket.const_defined? "AF_INET6"
+  class Socket
+    AF_INET6 = Object.new
+  end
+  class << IPSocket
+    alias getaddress_orig getaddress
+    def getaddress(s)
+      /^::/ =~ s ? s : getaddress_orig(s)
+    end
+  end
+end
+
 # IPAddr provides a set of methods to manipulate an IP address.  Both
 # IPv4 and IPv6 are supported.
 class IPAddr