fwdm: improve TLS handling

[gpotter2]

WIP

• some fixes regarding forwarding machine
• some fixes regarding HTTP parsing of CONNECT messages

[codecov]

Codecov Report

❌ Patch coverage is 5.97015% with 63 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.45%. Comparing base (c935a75) to head (9ef5846).

Files with missing lines	Patch %	Lines
scapy/fwdmachine.py	0.00%	29 Missing ⚠️
scapy/layers/tls/cert.py	13.79%	25 Missing ⚠️
scapy/layers/http.py	0.00%	5 Missing ⚠️
scapy/base_classes.py	0.00%	2 Missing ⚠️
scapy/supersocket.py	0.00%	2 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (c935a75) and HEAD (9ef5846). Click for more details.

HEAD has 10 uploads less than BASE

Flag	BASE (c935a75)	HEAD (9ef5846)
	12	2

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5092       +/-   ##
===========================================
- Coverage   80.96%   47.45%   -33.51%     
===========================================
  Files         390      372       -18     
  Lines       96994    96669      -325     
===========================================
- Hits        78530    45877    -32653     
- Misses      18464    50792    +32328     

Files with missing lines	Coverage Δ
scapy/base_classes.py	56.81% <0.00%> (-21.63%)	⬇️
scapy/supersocket.py	40.33% <0.00%> (-37.48%)	⬇️
scapy/layers/http.py	22.98% <0.00%> (-60.71%)	⬇️
scapy/layers/tls/cert.py	22.15% <13.79%> (-55.99%)	⬇️
scapy/fwdmachine.py	0.00% <0.00%> (-31.56%)	⬇️

... and 338 files with indirect coverage changes

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