* lib/drb/drb.rb: [DOC] Add note about start_service for each process
  Based on a patch by @rosenfeld [Fixes GH-514] [ci skip]
  https://github.com/ruby/ruby/pull/514


git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/trunk@44784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e