Added absolute path for config.ru as well. Turns out this is also needed to...

Added absolute path for config.ru as well. Turns out this is also needed to fix the daemon issue under ruby 1.8.7

[#4531 state:resolved]
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

railties/lib/rails/commands/server.rb

@@ -83,7 +83,8 @@ def default_options
         :environment => (ENV['RAILS_ENV'] || "development").dup,
         :daemonize   => false,
         :debugger    => false,
-        :pid         => File.expand_path("tmp/pids/server.pid")
+        :pid         => File.expand_path("tmp/pids/server.pid"),
+        :config      => File.expand_path("config.ru")
       })
     end
   end