* ext/socket/extconf.rb: test struct sockaddr_storage directly.

* ext/socket/rubysocket.h: use HAVE_TYPE_STRUCT_SOCKADDR_STORAGE.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39250 b2dd03c8-39d4-4d8f-98ff-823fe69b080e