component/re6stnet: PATH is not always set on the environment.

component/re6stnet/buildout.cfg

@@ -19,4 +19,4 @@ eggs =
 #       provided by SlapOS
 initialization =
   import os
-  os.environ['PATH'] = "${openvpn:location}/sbin:${babeld:location}/bin:${openssl:location}/bin:${python2.7:location}/bin:" + os.environ['PATH']
+  os.environ['PATH'] = "${openvpn:location}/sbin:${babeld:location}/bin:${openssl:location}/bin:${python2.7:location}/bin:" + os.environ.get('PATH', '/bin:/sbin:/usr/bin/:/usr/local/sbin')