respect the virtualenv by using /usr/bin/env

Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
diff --git a/planetstack/rr_observer/rrlib_config.py b/planetstack/rr_observer/rrlib_config.py
index 6d785e7..d0c00c2 100644
--- a/planetstack/rr_observer/rrlib_config.py
+++ b/planetstack/rr_observer/rrlib_config.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 DNSREDIR_CONFIGDIR_PREFIX = "/etc/dnsredir/"
 DNSREDIR_LOGDIR_PREFIX = "/var/log/dnsredir/"