=head1 WARNING
-As the data is buffered, SSL_operation() may return with a ERROR_SSL_WANT_READ
+As the data is buffered, SSL_operation() may return with an ERROR_SSL_WANT_READ
condition, but there is still data in the write buffer. An application must
not rely on the error value of SSL_operation() but must assure that the
write buffer is always flushed first. Otherwise a deadlock may occur as