[ruby-cvs:61492] nagachika:r54330 (ruby_2_2): merge revision(s) 53810: [Backport #12044]

[nagachika at ruby-lang.org]

nagachika	2016-03-29 01:06:29 +0900 (Tue, 29 Mar 2016)

  New Revision: 54330

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=54330

  Log:
    merge revision(s) 53810: [Backport #12044]
    
    * net/ftp.rb: add NullSocket#closed? to fix closing not opened
      connection.  [Fix GH-1232]

  Modified directories:
    branches/ruby_2_2/
  Modified files:
    branches/ruby_2_2/ChangeLog
    branches/ruby_2_2/lib/net/ftp.rb
    branches/ruby_2_2/test/net/ftp/test_ftp.rb
    branches/ruby_2_2/version.h