Fix remote PCAP detection logic

[kayoub5]

Fix #491

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 81.41%. Comparing base (4e9464d) to head (46a1f33).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
SharpPcap/LibPcap/LibPcapLiveDevice.cs	50.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #564      +/-   ##
==========================================
+ Coverage   81.28%   81.41%   +0.12%     
==========================================
  Files          51       51              
  Lines        2811     2814       +3     
  Branches      327      328       +1     
==========================================
+ Hits         2285     2291       +6     
+ Misses        415      412       -3     
  Partials      111      111              

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