undocumented because they are NOOPs or deprecated.
-.\" $OpenBSD: BIO_f_buffer.3,v 1.15 2023/04/26 15:03:02 schwarze Exp $
+.\" $OpenBSD: BIO_f_buffer.3,v 1.16 2023/04/28 16:49:00 schwarze Exp $
.\" full merge up to OpenSSL 99d63d46 Oct 26 13:56:48 2016 -0400
.\"
.\" This file is a derived work.
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
.\" OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd $Mdocdate: April 26 2023 $
+.Dd $Mdocdate: April 28 2023 $
.Dt BIO_F_BUFFER 3
.Os
.Sh NAME
.Nm BIO_set_write_buffer_size ,
.Nm BIO_set_buffer_size ,
.Nm BIO_set_buffer_read_data
-.\" .Nm BIO_buffer_get_num_lines is intentionally undocumented.
-.\" Contrary to what bio.h says, it does not *not* get some "IO type",
-.\" whatever that is supposed to be, but is a NOOP, and nothing uses it.
+.\" .Nm BIO_buffer_get_num_lines and
+.\" .Nm BIO_CTRL_GET are intentionally undocumented.
+.\" Contrary to what bio.h says, they do not *not* get some "IO type",
+.\" whatever that is supposed to be, but are NOOPs, and nothing uses them.
.Nd buffering BIO
.Sh SYNOPSIS
.In openssl/bio.h
-.\" $OpenBSD: BIO_f_cipher.3,v 1.14 2023/04/11 16:58:43 schwarze Exp $
+.\" $OpenBSD: BIO_f_cipher.3,v 1.15 2023/04/28 16:49:00 schwarze Exp $
.\" full merge up to: OpenSSL e9b77246 Jan 20 19:58:49 2017 +0100
.\"
.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
.\" OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd $Mdocdate: April 11 2023 $
+.Dd $Mdocdate: April 28 2023 $
.Dt BIO_F_CIPHER 3
.Os
.Sh NAME
.Nm BIO_set_cipher ,
.Nm BIO_get_cipher_status ,
.Nm BIO_get_cipher_ctx
+.\" .Nm BIO_CTRL_SET is intentionally undocumented because it has no effect.
.Nd cipher BIO filter
.Sh SYNOPSIS
.In openssl/bio.h
-.\" $OpenBSD: BIO_s_bio.3,v 1.17 2023/04/11 16:58:43 schwarze Exp $
+.\" $OpenBSD: BIO_s_bio.3,v 1.18 2023/04/28 16:49:00 schwarze Exp $
.\" full merge up to: OpenSSL 99d63d46 Oct 26 13:56:48 2016 -0400
.\"
.\" This file was written by
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
.\" OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd $Mdocdate: April 11 2023 $
+.Dd $Mdocdate: April 28 2023 $
.Dt BIO_S_BIO 3
.Os
.Sh NAME
.\" .Nm BIO_nread
.\" .Nm BIO_nwrite0
.\" .Nm BIO_nwrite
+.\" .Nm BIO_C_NREAD0
+.\" .Nm BIO_C_NREAD
+.\" .Nm BIO_C_NWRITE0
+.\" .Nm BIO_C_NWRITE
.Nd BIO pair BIO
.Sh SYNOPSIS
.In openssl/bio.h
-.\" $OpenBSD: BIO_s_datagram.3,v 1.2 2022/12/28 07:59:13 jsg Exp $
+.\" $OpenBSD: BIO_s_datagram.3,v 1.3 2023/04/28 16:49:00 schwarze Exp $
.\"
.\" Copyright (c) 2022 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: December 28 2022 $
+.Dd $Mdocdate: April 28 2023 $
.Dt BIO_S_DATAGRAM 3
.Os
.Sh NAME
.Nm BIO_dgram_recv_timedout ,
.Nm BIO_dgram_send_timedout ,
.Nm BIO_dgram_non_fatal_error
+.\" .Nm BIO_CTRL_DGRAM_QUERY_MTU and
+.\" .Nm BIO_CTRL_DGRAM_MTU_DISCOVER are intentionally undocumented.
+.\" They are almost unused, and OpenBSD does not appear to support them.
.Nd datagram socket BIO
.Sh SYNOPSIS
.In openssl/bio.h
.It Dv BIO_CTRL_SET_CLOSE
.Xr BIO_set_close 3
.El
-.\" OpenBSD does not appear to support
-.\" BIO_CTRL_DGRAM_MTU_DISCOVER and BIO_CTRL_DGRAM_QUERY_MTU.
.Ss Input and output operations
.Xr BIO_read 3
attempts to read up to
-.\" $OpenBSD: BIO_s_file.3,v 1.13 2023/04/26 15:03:02 schwarze Exp $
+.\" $OpenBSD: BIO_s_file.3,v 1.14 2023/04/28 16:49:00 schwarze Exp $
.\" full merge up to: OpenSSL 99d63d46 Oct 26 13:56:48 2016 -0400
.\" selective merge up to: OpenSSL 1212818e Sep 11 13:22:14 2018 +0100
.\"
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
.\" OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd $Mdocdate: April 26 2023 $
+.Dd $Mdocdate: April 28 2023 $
.Dt BIO_S_FILE 3
.Os
.Sh NAME
.Nm BIO_write_filename ,
.Nm BIO_append_filename ,
.Nm BIO_rw_filename
+.\" Nm BIO_CTRL_SET_FILENAME is unsused and intentionally undocumented.
.Nd FILE BIO
.Sh SYNOPSIS
.In openssl/bio.h