for the required condition. When using a buffering BIO, like a BIO pair, data
must be written into or retrieved out of the BIO before being able to continue.
-=head1 IMPORTANT
+=head1 WARNING
When an SSL_write() operation has to be repeated because of
B<SSL_ERROR_WANT_READ> or B<SSL_ERROR_WANT_WRITE>, it must be repeated
The write operation was not successful. Call SSL_get_error() with the return
value B<ret> to find out, whether an error occurred.
-=item -1
+=item E<lt>0
The read operation was not successful, because either an error occurred
or action must be taken by the calling process. Call SSL_get_error() with the