Detailed documentation on initialization, configuration, and early termination

[wlandau]

The bot seems simple enough to use, but I am still unsure how to set OOO time. For example, if I comment with "/ooo 9/15 until 10/2", does the range of days include 10/2, or does it only go through 10/1? Can I substitute "until" with "through" or "to"? What other keywords are supported? Will an empty call to "/ooo" cancel the autoresponder?