git: d6c2d4fe975c - main - kill.1: mention special meaning of PGID as a PID

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=d6c2d4fe975c70975bdc6bec76d044408f6dcb8c

commit d6c2d4fe975c70975bdc6bec76d044408f6dcb8c
Author:     artembunichev <artembunichev@zohomail.com>
AuthorDate: 2025-01-19 12:58:55 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2025-01-19 13:31:36 +0000

    kill.1: mention special meaning of PGID as a PID
    
    PR:      284158
    MFC after:      3 days
---
 bin/kill/kill.1 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bin/kill/kill.1 b/bin/kill/kill.1
index 02357ff60c19..003d09f09339 100644
--- a/bin/kill/kill.1
+++ b/bin/kill/kill.1
@@ -85,6 +85,9 @@ group ID of the sender, and for which the process has permission.
 .It -1
 If superuser, broadcast the signal to all processes; otherwise broadcast
 to all processes belonging to the user.
+.It - Ns Ar PGID
+The signal is sent to all processes that belong to the specified
+process group ID (PGID).
 .El
 .Pp
 Some of the more commonly used signals: