Revert "Merge pull request #125 from brainopia/master"

It appears that this is causing issues with process termination.

This reverts commit d2c9ce0f34, reversing
changes made to 98337c92e1.

lib/foreman/engine.rb

@@ -72,16 +72,10 @@ private ######################################################################
   def kill_all(signal="SIGTERM")
     running_processes.each do |pid, process|
       info "sending #{signal} to pid #{pid}"
-      kill(signal, -pid) or kill(signal, pid)
+      Process.kill(signal, pid) rescue Errno::ESRCH
     end
   end
 
-  def kill(signal, pid)
-    Process.kill signal, pid
-  rescue Errno::ESRCH
-    false
-  end
-
   def terminate_gracefully
     info "sending SIGTERM to all processes"
     kill_all "SIGTERM"

lib/foreman/process.rb

@@ -30,13 +30,11 @@ private
   def fork_with_io(command)
     reader, writer = IO.pipe
     pid = fork do
-      Process.setpgrp
       trap("INT", "IGNORE")
       $stdout.reopen writer
       reader.close
       exec Foreman.runner, replace_command_env(command)
     end
-    Process.detach pid
     [ reader, pid ]
   end