Fix start_tls() loses buffer data and hangs when upgrading the connection#708

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fizzi01 wants to merge 2 commits intoMagicStack:masterfrom

Commits on Dec 18, 2025

Transfer buffered data from old protocol to SSL layer in start_tls()
fizzi01
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Commits on Dec 19, 2025

Fix wrong return behavior when missing _stream_reader in protocol
fizzi01
committed