Certain licenses are listed as compatible with CC-SA on their website. If I have something that is CC-SA, say, version 3, can I redistribute it under CC-SA version 4, even if I made no modifications. To be clear, I would be following all the other requirements that CC-SA gives for this.
In general, how often do licenses require this? (Apparently BSD doesn't.)
The reason I ask is because it is important for this Meta post: Here is a way we can update all the code to a compatible license.