ERR_peek_error    656 event/ngx_event_openssl.c     if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) {
ERR_peek_error    891 event/ngx_event_openssl.c     if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) {
ERR_peek_error   1205 event/ngx_event_openssl.c     if (n != 1 && ERR_peek_error()) {
ERR_peek_error   1311 event/ngx_event_openssl.c         n = ERR_GET_REASON(ERR_peek_error());
ERR_peek_error   1376 event/ngx_event_openssl.c     while (ERR_peek_error()) {