This PR fixes a panic issue in the WaitGroup that occurs when Gitea is
shut down using Ctrl+C.
It ensures that all active connection pointers in the server are
properly tracked and forcibly closed when the hammer shutdown is
invoked.
The process remains graceful — the normal shutdown sequence runs before
the hammer is triggered, and existing connections are given a timeout
period to complete gracefully.
This PR also fixes `no logger writer` problem. Now the log close will
only be invoked when the command exit.
- Fixes#35468
- Fixes#35551
- Fixes#35559
- Replace #35578
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
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