Use IPC::Run and IPC::Run3 safely

 IPC::Run and IPC::Run3 are both very upset when you try to use them under
 environments where you have STDOUT and/or STDERR tied to something else, such
 as under fastcgi.
 .
 The module adds safe-guarding code when you call IPC::Run or IPC::Run3 under
 such environment to make sure it always works.