Search the SauceNAO databases for the given image url. If no image url is provided, the first image in the past 20 messages will be used.
Valid image formats include .PNG, .JPG, and .GIF
Modify the amount of results the sauce command returns, from 1 to 5.
Locks the sauce command to the specified channel, so that sauce queries may only be run in that channel.
Unlocks the sauce command if it is locked.