Support vanilla AFl directory format for casr-afl

[headshog]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 3 lines in your changes missing coverage. Please review.

Project coverage is 65.94%. Comparing base (dc48b45) to head (252805c).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
casr/src/bin/casr-afl.rs	83.33%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #240      +/-   ##
==========================================
+ Coverage   65.92%   65.94%   +0.01%     
==========================================
  Files          32       32              
  Lines        7894     7904      +10     
==========================================
+ Hits         5204     5212       +8     
- Misses       2690     2692       +2     

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