merge revision(s) r44637: [Backport #9385]

	* lib/open-uri.rb: Make proxy disabling working again.
	  Fixed by Christophe Philemotte.   [ruby-core:59650] [Bug #9385]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@45014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e