The timer command of version 1.6 is now accessable by using "/maintenance timer endtimer <minutes>" - It will enable maintenance mode for the given time in minutes. After that, it will be disabled again - also, you will have to delete your old config!
Added "/maintenance timer starttimer <minutes>" command - It will active maintenance mode after the given time in minutes with broadcasts in between (take at look at the config).
Added aliases to "/maintenance timer abort": "/maintenance timer stop" and "/maintenance timer cancel".
Raised max timer time from 7 days to 28 days (to 40320 minutes).
Removed the MaintenanceBungee prefix from the enable and disable messages, so you can choose your own one.
Removed command usage from config
Some performance improvements
If you were using an older version of the plugin, you have to delete you old config, so the new lines will be generated in it. Else, you will get errors on executing the commands.