merge revision(s) 44492: [Backport #9351]

	* lib/rinda/ring.rb (Rinda::RingFinger#make_socket):  Use
	  ipv4_multicast_loop option for portability.  Patch by Jeremy Evans.
	  [ruby-trunk - Bug #9351]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45041 b2dd03c8-39d4-4d8f-98ff-823fe69b080e