[src/trunk]: src/usr.bin/newsyslog Document what ngen 0 does.

[wiz <wiz%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/69402abd676f
branches:  trunk
changeset: 325367:69402abd676f
user:      wiz <wiz%NetBSD.org@localhost>
date:      Fri Dec 20 10:14:25 2013 +0000

description:
Document what ngen 0 does.
>From David Gutteridge in PR 48460.

diffstat:

 usr.bin/newsyslog/newsyslog.8 |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r 328ed2d0beab -r 69402abd676f usr.bin/newsyslog/newsyslog.8
--- a/usr.bin/newsyslog/newsyslog.8     Fri Dec 20 10:13:24 2013 +0000
+++ b/usr.bin/newsyslog/newsyslog.8     Fri Dec 20 10:14:25 2013 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: newsyslog.8,v 1.37 2012/06/17 03:52:32 christos Exp $
+.\"    $NetBSD: newsyslog.8,v 1.38 2013/12/20 10:14:25 wiz Exp $
 .\"
 .\" Copyright (c) 1999, 2000 Andrew Doran <ad%NetBSD.org@localhost>
 .\" All rights reserved.
@@ -40,7 +40,7 @@
 .\"
 .\" from FreeBSD: newsyslog.8,v 1.14.2.1 1999/02/25 18:38:33 wollman Exp
 .\"
-.Dd June 16, 2012
+.Dd December 20, 2014
 .Dt NEWSYSLOG 8
 .Os
 .Sh NAME
@@ -134,6 +134,8 @@
 .It Ar ngen
 Specify the number of archive files to be kept
 besides the log file itself.
+A value of 0 disables the deletion of any archive files during log
+rotation.
 .It Ar size
 When the size of the log file reaches
 .Ar size