merge revision(s) r47079: [Backport #9129] [Backport #10531]

	* lib/net/http.rb (Net::HTTP.proxy_uri): use initializer instead
	  of parser to handle IPv6 address. [Bug #9129]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@49076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e