Added "ignore' as an action

batteryd.conf.example

@@ -6,6 +6,8 @@
 #
 # There are three available battery levels: HALF, LOW, CRITICAL and their percentage value can be configured
 # The actions can be as follows:
+# - "ignore": it does not do any action, and skips all other actions supplied for the given battery level.
+#             If no action is supplied for a level, batteryd will default to "ignore"
 # - "notify": sends a notification to the user and informs them about the battery percentage via notify-send
 # - "sleep": suspends system to RAM, waits for a configured amount of time.
 # - "shutdown": gracefully shuts down the system, waits for a configured amount of time.