git: 317cf8a1f832 - stable/13 - cu.1: describe better + tag spdx

The branch stable/13 has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=317cf8a1f83255811d35776674395a47a6d7f0b0

commit 317cf8a1f83255811d35776674395a47a6d7f0b0
Author:     Alexander Ziaee <concussious@runbox.com>
AuthorDate: 2024-09-14 23:26:16 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-12-28 18:17:30 +0000

    cu.1: describe better + tag spdx
    
    Preserve over 40 years of "call UNIX" BSD heritage
    while answering "one line about what it does" e.g.
    
    "how do I get a serial console?"
    "% apropos serial"
    
    MFC after:      3 days
    Reported by:    imp
    
    Reviewed by: imp
    Pull Request: https://github.com/freebsd/freebsd-src/pull/1423
    
    (cherry picked from commit 4d12c7b9df660b15580ff3b07ef5570d1cab958a)
---
 usr.bin/tip/tip/cu.1 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/usr.bin/tip/tip/cu.1 b/usr.bin/tip/tip/cu.1
index 8d6fae3be8fc..1852d65d98cb 100644
--- a/usr.bin/tip/tip/cu.1
+++ b/usr.bin/tip/tip/cu.1
@@ -1,3 +1,6 @@
+.\"-
+.\" SPDX-License-Identifier: BSD-3-Clause
+.\"
 .\"	$OpenBSD: cu.1,v 1.3 2006/06/07 06:35:59 mbalmer Exp $
 .\"
 .\" Copyright (c) 1980, 1990, 1993
@@ -34,7 +37,7 @@
 .Os
 .Sh NAME
 .Nm cu
-.Nd call UNIX
+.Nd call UNIX over a serial line
 .Sh SYNOPSIS
 .Nm
 .Op Fl ehot