Give each PSK thread its own heap copy of connfd#582
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Pass a per-connection malloc'd descriptor instead of the address of the reused stack variable connfd, which the next accept() could overwrite before the thread dereferences it; the thread frees it after copying.
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Fenrir Automated Review — PR #582
Scan targets checked: wolfssl-examples-bugs, wolfssl-examples-src
No new issues found in the changed files. ✅
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Pass a per-connection malloc'd descriptor instead of the address of the reused stack variable connfd, which the next accept() could overwrite before the thread dereferences it; the thread frees it after copying.