Forbid timeout on AsyncSniffer

[gpotter2]

closes #4890

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.59%. Comparing base (3f7bed3) to head (7b9e068).

Files with missing lines	Patch %	Lines
scapy/sendrecv.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5088      +/-   ##
==========================================
- Coverage   80.59%   80.59%   -0.01%     
==========================================
  Files         390      390              
  Lines       96841    96843       +2     
==========================================
- Hits        78048    78047       -1     
- Misses      18793    18796       +3     

Files with missing lines	Coverage Δ
scapy/sendrecv.py	87.15% <50.00%> (-0.11%)	⬇️

... and 6 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.