ctfmerge.1: Import ENVIRONMENT from NetBSD

Import the ENVIRONMENT section from NetBSD, minus the variable that our
ctfmerge does not have. Alphabetize them, polish grammar and alignment,
and add the variables to the man database. While here, remove whitespace
from the end of some lines to quiet linter.

MFC after:	3 days
PR:		291186
Co-authored-by:	Alexander Ziaee <ziaee@FreeBSD.org>
Obtained from:  NetBSD (christos <christos@NetBSD.org>, 8a0c0d8)
Differential Revision:	https://reviews.freebsd.org/D54054

(cherry picked from commit 32cf24b725fdf899fb642c47004b69fcfae9b9db)

1 files changed, 48 insertions, 26 deletions

diff --git a/cddl/usr.bin/ctfmerge/ctfmerge.1 b/cddl/usr.bin/ctfmerge/ctfmerge.1
index 2bc70db82dc9..1e371e62c9c5 100644
--- a/cddl/usr.bin/ctfmerge/ctfmerge.1
+++ b/cddl/usr.bin/ctfmerge/ctfmerge.1
@@ -1,32 +1,32 @@
 .\"
-.\" Copyright (c) 2010 The FreeBSD Foundation 
-.\" All rights reserved. 
-.\" 
+.\" Copyright (c) 2010 The FreeBSD Foundation
+.\" All rights reserved.
+.\"
 .\" This software was developed by Rui Paulo under sponsorship from the
-.\" FreeBSD Foundation. 
-.\"  
-.\" Redistribution and use in source and binary forms, with or without 
-.\" modification, are permitted provided that the following conditions 
-.\" are met: 
-.\" 1. Redistributions of source code must retain the above copyright 
-.\"    notice, this list of conditions and the following disclaimer. 
-.\" 2. Redistributions in binary form must reproduce the above copyright 
-.\"    notice, this list of conditions and the following disclaimer in the 
-.\"    documentation and/or other materials provided with the distribution. 
-.\" 
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
-.\" SUCH DAMAGE. 
+.\" FreeBSD Foundation.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
 .\"
-.Dd April 21, 2022
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd June 30, 2026
 .Dt CTFMERGE 1
 .Os
 .Sh NAME
@@ -104,6 +104,28 @@ Copy CTF data from
 into
 .Ar destfile .
 .El
+.Sh ENVIRONMENT
+The following environment variables are used by
+.Nm :
+.Bl -tag -width "CTFMERGE_TERMINATE_NO_UNLINK"
+.It Ev CTFMERGE_DEBUG_LEVEL
+Increase debugging verbosity
+.Pq maximum 3 .
+.It Ev CTFMERGE_INPUT_THROTTLE
+Max queue size to queue
+.Pq default 10 .
+.It Ev CTFMERGE_PHASE1_BATCH_SIZE
+Number of files in a slot that are needed before processing starts
+.Pq default 8 .
+.It Ev CTFMERGE_MAX_SLOTS
+Number of round-robin slots in the input queue that is processed by
+worker threads.
+Each slot represents a file batch
+.Pq default 5 .
+.It Ev CTFMERGE_TERMINATE_NO_UNLINK
+Do not remove temporary files on exit,
+so that they can be examined for debugging.
+.El
 .Sh EXIT STATUS
 .Ex -std
 .Sh SEE ALSO