merge revision(s) 42271: [Backport #8713]

	* lib/uri/common.rb (URI.decode_www_form_component):
	  Don't raise error when str includes multibyte characters.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42355 b2dd03c8-39d4-4d8f-98ff-823fe69b080e