In v3 UNIX, the kill utility is documented in category 8, not 1.

Add a note of it.
http://minnie.tuhs.org/cgi-bin/utree.pl?file=V3/man/man8/kill.8

PR:		211786
Approved by:	bcr (mentor)
Obtained from:	TUHS
Differential Revision:	https://reviews.freebsd.org/D8105

bin/kill/kill.1

@@ -32,7 +32,7 @@
 .\"	@(#)kill.1	8.2 (Berkeley) 4/28/95
 .\" $FreeBSD$
 .\"
-.Dd April 28, 1995
+.Dd October 3, 2016
 .Dt KILL 1
 .Os
 .Sh NAME
@@ -147,7 +147,8 @@ compatible.
 A
 .Nm
 command appeared in
-.At v3 .
+.At v3
+in section 8 of the manual.
 .Sh BUGS
 A replacement for the command
 .Dq Li kill 0