Merge pull request #120 from mpiscaer/patch-1

correct typo in the backup_service_period help message
diff --git a/staffeln/conf/conductor.py b/staffeln/conf/conductor.py
index ff39f13..ab8e258 100755
--- a/staffeln/conf/conductor.py
+++ b/staffeln/conf/conductor.py
@@ -21,7 +21,7 @@
         "backup_service_period",
         default=1800,
         min=60,
-        help=_("The time of bakup period, the unit is one second."),
+        help=_("The time of backup period, the unit is one second."),
     ),
     cfg.IntOpt(
         "backup_min_interval",