Comment # 10 on bug 1116995 from Michael Andres

Fixed the leaking filedescriptors (/dev/null and sockets)
  TUMBLEWEED      libzypp 17.13.0   
  SLE-15+         libzypp 17.13.0   
  SLE-12-SP2+     libzypp 16.20.2   
  SLE-12-SP1      libzypp 15.28.2   
  SLE-12          libzypp 14.48.2