Version ++4.31c (release)

SAND mode added (docs/SAND.md) for more effecient fuzzing with sanitizers
(thanks to @wtdcode !)
afl-fuzz:

splicing phase is now DISABLED by default because research showed
it is counterproductive. New command line parameter -u to enable
it. Splicing is auto-enabled if two cycles without finds happen.
Python 3.13+...