Fix CLIUtil overlap

[gpotter2]

• fix multiple CLIUtil overlapping
• the method chosen is very similar to what we do in Automaton

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 2 lines in your changes missing coverage. Please review.

Project coverage is 81.26%. Comparing base (cbb09c4) to head (7852c9b).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
scapy/utils.py	90.90%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4769   +/-   ##
=======================================
  Coverage   81.26%   81.26%           
=======================================
  Files         363      363           
  Lines       88325    88343   +18     
=======================================
+ Hits        71773    71790   +17     
- Misses      16552    16553    +1     

Files with missing lines	Coverage Δ
scapy/utils.py	74.57% <90.90%> (+0.13%)	⬆️

... and 6 files with indirect coverage changes

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