How does the Addon.txt file work for legacy addons?

[Leat]

Thank you TylerB, I'm a total fucknut. I just went in and changed info.txt to addon.txt and wouldn't you know it, all this stress and time searching for the magical cure was right in front of my eyes. =\ /facepalm to the max.

[Tyler B.]

It's the same format as info.txt was, just with a new name.