* 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://ci.ruby-lang.org/ruby/trunk@44784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sat Feb  1 06:38:51 2014  Zachary Scott  <e@zzak.io>
+
+	* 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
+
 Sat Feb  1 06:30:20 2014  Zachary Scott  <e@zzak.io>
 
 	* error.c: [DOC] Document Exception#cause by @jasonrclark [ci skip]

lib/drb/drb.rb

@@ -177,6 +177,9 @@ require 'drb/eq'
 #   # Not necessary for this small example, but will be required
 #   # as soon as we pass a non-marshallable object as an argument
 #   # to a dRuby call.
+#   #
+#   # Note: this must be called at least once per process to take any effect.
+#   # This is particularly important if your application forks.
 #   DRb.start_service
 #
 #   timeserver = DRbObject.new_with_uri(SERVER_URI)