[PR #10003/78d1be5 backport][3.10] Fix client connection header not reflecting connector force_close value

[bdraco]

(cherry picked from commit 78d1be5)

[codspeed-hq]

CodSpeed Performance Report

Merging #10008 will not alter performance

_{Comparing patchback/backports/3.10/78d1be5d79f67597313354646eec200ff603fd9d/pr-10003 (90a8951) with 3.10 (f5d5da4)}

Summary

✅ 43 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.94%. Comparing base (361db7c) to head (90a8951).
Report is 133 commits behind head on 3.10.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             3.10   #10008      +/-   ##
==========================================
+ Coverage   97.78%   97.94%   +0.15%     
==========================================
  Files         108      116       +8     
  Lines       34840    36217    +1377     
  Branches     4164     4385     +221     
==========================================
+ Hits        34070    35473    +1403     
+ Misses        573      552      -21     
+ Partials      197      192       -5     

Flag	Coverage Δ
CI-GHA	97.84% <100.00%> (+0.15%)	⬆️
OS-Linux	97.53% <100.00%> (+0.16%)	⬆️
OS-Windows	95.17% <100.00%> (+0.20%)	⬆️
OS-macOS	97.24% <100.00%> (+0.18%)	⬆️
Py-3.10.11	97.10% <100.00%> (+0.05%)	⬆️
Py-3.10.15	97.04% <100.00%> (+0.06%)	⬆️
Py-3.11.10	97.11% <100.00%> (+0.16%)	⬆️
Py-3.11.9	97.18% <100.00%> (+0.14%)	⬆️
Py-3.12.6	?
Py-3.12.7	97.61% <100.00%> (?)
Py-3.13.0	97.60% <100.00%> (?)
Py-3.8.10	94.57% <100.00%> (+0.08%)	⬆️
Py-3.8.18	96.89% <100.00%> (+0.11%)	⬆️
Py-3.9.13	97.01% <100.00%> (+0.06%)	⬆️
Py-3.9.20	96.96% <100.00%> (+0.06%)	⬆️
Py-pypy7.3.16	96.56% <100.00%> (+0.06%)	⬆️
VM-macos	97.24% <100.00%> (+0.18%)	⬆️
VM-ubuntu	97.53% <100.00%> (+0.16%)	⬆️
VM-windows	95.17% <100.00%> (+0.20%)	⬆️

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