[swhitty]

AsyncSocket.close() is now async and removes socket from pool resuming waiting suspensions.
fixes #251

Similar to the solution offered by @lhoward in #250

Graceful shutdown of HTTPServer.stop() now ends immediately after all connections are drained and the listening socket is closed.

[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.74%. Comparing base (6245651) to head (f8f5701).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
FlyingFox/Sources/HTTPServer.swift	87.50%	2 Missing ⚠️
FlyingSocks/Sources/AsyncSocket.swift	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #252      +/-   ##
==========================================
- Coverage   93.79%   93.74%   -0.06%     
==========================================
  Files          72       72              
  Lines        3820     3837      +17     
==========================================
+ Hits         3583     3597      +14     
- Misses        237      240       +3     

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