Roll AFL 2.30b..2.31b

third_party/afl/src/docs/ChangeLog

 =========
 ChangeLog
 =========
 
   This is the list of all noteworthy changes made in every public release of
   the tool. See README for the general instruction manual.
 
 ----------------
 Staying informed
 ----------------
 
 Want to stay in the loop on major new features? Join our mailing list by
 sending a mail to <afl-users+subscribe@googlegroups.com>.
 
 Not sure if you should upgrade? The lowest currently recommended version
-is 2.23b. If you're stuck on an earlier release, it's strongly advisable
+is 2.31b. If you're stuck on an earlier release, it's strongly advisable
 to get on with the times.
 
 --------------
+Version 2.31b:
+--------------
+
+  - Changed havoc cycle counts for a marked performance boost, especially
+    with -S / -d. See the discussion of FidgetyAFL in:
+
+    https://groups.google.com/forum/#!topic/afl-users/fOPeb62FZUg
+
+    While this does not implement the approach proposed by the authors of
+    the CCS paper, the solution is a result of digging into that research;
+    more improvements may follow as I do more experiments and get more
+    definitive data.
+
+--------------
 Version 2.30b:
 --------------
 
   - Made minor improvements to persistent mode to avoid the remote
     possibility of "no instrumentation detected" issues with very low
     instrumentation densities.
 
   - Fixed a minor glitch with a leftover process in persistent mode.
     Reported by Jakub Wilk and Daniel Stender.
 
@@ skipping 2402 matching lines @@
 
   - Refactored the handling of long bitflips and some swaps.
 
   - Fixed the handling of gcc -pipe, thanks to anonymous reporter.
 
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 Version 0.21b:
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   - Initial public release.