merge revision(s) r45529: [Backport #8182]

	* lib/xmlrpc/client.rb (do_rpc): don't check body length.
	  If HTTP content-encoding is used, the length may be different.
	  [Bug #8182] [ruby-core:53811]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@46186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e