Clarify dates at which software must be available for the available category

[johntran-nv]

It looks like we were not clear on this, as I don't see it in the rules doc, but I believe the goal in the past was that software must be publicly available on submission day (not publication day).

[arjunsuresh]

yes, the rule says so (submission day). But in case of "closed software" I'm not sure how this availability can be determined.