AFL: lowest recommended version is 2.41b, current is 2.52b

[vanhauser-thc]

I see from the afl/Changelog n perf-fuzz that it is based on 2.40b

From the currentl 2.52b Changelog:
"The lowest currently recommended version is 2.41b.
If you're stuck on an earlier release, it's strongly advisable to get on with the times."

These might be relevant/interesting fixes since 2.40b:

• Fixed a resumption offset glitch spotted by Jakub Wilk.
• Fixed an interesting timing corner case spotted by Jakub Wilk.
• In-place resume now preserves .synced. Suggested by Jakub Wilk.
• Added AFL_NO_ARITH to aid in the fuzzing of text-based formats.
  Requested by Jakub Wilk.
• Addressed a major user complaint related to timeout detection. Timing out
  inputs are now binned as "hangs" only if they exceed a far more generous
  time limit than the one used to reject slow paths.

that being said: thanks a lot for publishing your work!