merge revision(s) 41266: [Backport #8517]
* ext/socket/extconf.rb: Enable RFC 3542 IPV6 socket options for OS X 10.7+. [ruby-trunk - Bug #8517]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@41643 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 41266: [Backport #8517]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@41643 b2dd03c8-39d4-4d8f-98ff-823fe69b080e