embolalia/willie — pull request #441 by saltire (2014-01-31 02:59:52+00:00)
Title: [admin] Commands to append/remove values to config options

If a config option contains a list, we can use the .addto and
.removefrom commands to modify the list without having to retype the
whole thing.

Also, after making a change the bot will confirm the new setting with a reply.