Switch camelCase to snake_case

Change-Id: I035f1b9d2350381244ddce76fa4e0f3fa19ae225
diff --git a/README.rst b/README.rst
index a7e0b72..6a003ea 100644
--- a/README.rst
+++ b/README.rst
@@ -84,7 +84,7 @@
       incr_before_full: 3
       backup_dir: /var/backups/mysql/xtrabackup
       backup_times:
-        dayOfWeek: 0
+        day_of_week: 0
         hour: 4
         minute: 52
       compression: true
@@ -101,7 +101,7 @@
   ``backup_times`` parameters is not defined, the defalut ``*`` value will be
   used. For example, if minute parameter is ``*``, it will run the backup every minute,
   which is ususally not desired.
-  Available parameters are ``dayOfWeek``, ``dayOfMonth``, ``month``, ``hour`` and ``minute``.
+  Available parameters are ``day_of_week``, ``day_of_month``, ``month``, ``hour`` and ``minute``.
   Please see the crontab reference for further info on how to set these parameters.
 
   .. note:: Please be aware that only ``backup_times`` section OR
@@ -154,7 +154,7 @@
       incr_before_full: 3
       backup_dir: /srv/backup
       backup_times:
-        dayOfWeek: 0
+        day_of_week: 0
         hour: 4
         minute: 52
       key: