Fix issues with thread leakage#326

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grahamegrieve wants to merge 2 commits intoIndySockets:masterfrom

grahamegrieve:FIX_HTTP_SERVER_LEAK

Commits on Oct 21, 2020

Fix issues with thread leakage
grahamegrieve
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Commits on Oct 22, 2020

update IdHl7 so the thread uses TIdThread not TThread directly
grahamegrieve
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