git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@27971 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r27690 and r27903 from trunk into ruby_1_9_2.¶
@sock.shutdown raises an exception. [ruby-dev:34881]
--
object only when it is not closed. [ruby-dev:41350]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@27971 b2dd03c8-39d4-4d8f-98ff-823fe69b080e