2013-03-15-19.04.33: src/lib/std/src/unsafe/unsafe.api:  Renamed toplevel_fate -> sigint_fate because it is executed (only) when handling a SIGINT.  Set up in src/lib/core/internal/make-mythryld-executable.pkg, used in interruptible() in src/lib/compiler/toplevel/interact/read-eval-print-loop-g.pkg.