Revert "tls.c: need to free SSL_SESSION when removing it from cache" #4819
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This reverts commit a3523d4.
imapd does crash sometimes, when it handles the TLS connection. #4785 describes such reports from different users.
In such cases Cyrus can log “no shared cipher in SSL_accept() -> fail” or “unexpected eof while reading in SSL_accept() -> fail”.
The recommendation at openssl/openssl#23031 (comment) also states, than doing
SSL_SESSION_free()
during remove_session_cb() is wrong. If there were leaks, there is probably another case where there is a missing SSL_SESSION_free() call but this place is not right.• backport to 3.10 and 3.8