There is a hint at https://github.com/sagemath/sage/wiki/Infrastructure
-- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/sage-support/ad50ad62-d7d5-48c6-9465-6c46fdd6cdd7n%40googlegroups.com.