[bacescuandrei]

Description

UTCTimeField.i2repr() raises OverflowError: date value out of range when the timestamp is outside of the years datetime supports, so show() and sprintf() fail on such packets:

>>> from scapy.layers.ntlm import NTLMv2_CLIENT_CHALLENGE
>>> NTLMv2_CLIENT_CHALLENGE(b"\xff" * 24).show()
OverflowError: date value out of range

With this change, i2repr() returns the number of seconds alone for these values, as it does after the date for other values.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.18%. Comparing base (bf1b540) to head (edd170c).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5247      +/-   ##
==========================================
+ Coverage   81.17%   81.18%   +0.01%     
==========================================
  Files         394      394              
  Lines       98770    98773       +3     
==========================================
+ Hits        80178    80191      +13     
+ Misses      18592    18582      -10     

Files with missing lines	Coverage Δ
scapy/fields.py	92.88% <100.00%> (+0.01%)	⬆️

... and 5 files with indirect coverage changes

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[gpotter2]

Thanks for the PR !