slightly rework the low battery level command, and change option to '…

…o' instead of 'e'

README

@@ -22,7 +22,7 @@ Application Options:
   -i, --icon-type                  Set icon type ('standard', 'notification' or 'symbolic')
   -l, --low-level                  Set low battery level (in percent)
   -r, --critical-level             Set critical battery level (in percent)
-  -e, --command-low-level          Command to execute when low battery level is reached
+  -o, --command-low-level          Command to execute when low battery level is reached
   -c, --command-critical-level     Command to execute when critical battery level is reached
   -x, --command-left-click         Command to execute when left clicking on tray icon
   -n, --hide-notification          Hide the notification popups
@@ -47,8 +47,7 @@ Examples:
   cbatticon -t
   cbatticon -p
   cbatticon -u 20 -i notification -c "poweroff" -l 15 -r 3
-  # if xbacklight is installed
-  cbatticon -u 20 -i notification -r 3 -c "poweroff" -l 15 -r "xbacklight = 5"
+  cbatticon -u 20 -i notification -r 3 -c "poweroff" -l 15 -o "xbacklight = 5"
 
 Thanks to:
 

cbatticon.1

@@ -29,6 +29,8 @@ Specify the low level percentage of the battery.
 The default is set to 20%.
 .IP "\fB-n\fP, \fB\-\-hide-notification\fP" 5
 Hide the notification popups.
+.IP "\fB\-o\fP, \fB\-\-command-low-level\fP \fIcommand\fR" 5
+Specify the command to execute when the low battery level is reached.
 .IP "\fB-p\fP, \fB\-\-list-power-supplies\fP" 5
 List the available power supplies on your system.
 .IP "\fB\-r\fP, \fB\-\-critical-level\fP \fIpercentage\fR" 5

cbatticon.c

@@ -166,7 +166,7 @@ static gint get_options (int argc, char **argv)
         { "icon-type"             , 'i', 0, G_OPTION_ARG_STRING, &icon_type_string                    , N_("Set icon type ('standard', 'notification' or 'symbolic')") , NULL },
         { "low-level"             , 'l', 0, G_OPTION_ARG_INT   , &configuration.low_level             , N_("Set low battery level (in percent)")                       , NULL },
         { "critical-level"        , 'r', 0, G_OPTION_ARG_INT   , &configuration.critical_level        , N_("Set critical battery level (in percent)")                  , NULL },
-        { "command-low-level"     , 'e', 0, G_OPTION_ARG_STRING, &configuration.command_low_level     , N_("Command to execute when low battery level is reached")     , NULL },
+        { "command-low-level"     , 'o', 0, G_OPTION_ARG_STRING, &configuration.command_low_level     , N_("Command to execute when low battery level is reached")     , NULL },
         { "command-critical-level", 'c', 0, G_OPTION_ARG_STRING, &configuration.command_critical_level, N_("Command to execute when critical battery level is reached"), NULL },
         { "command-left-click"    , 'x', 0, G_OPTION_ARG_STRING, &configuration.command_left_click    , N_("Command to execute when left clicking on tray icon")       , NULL },
 #ifdef WITH_NOTIFY