correct Research Unix edition "appeared in" use in HISTORY

Starting from "Combined Table of Contents" in Doug McIlroy's
"A Research UNIX Reader" a table of which edition manuals appeared in.
Checked against manuals from bitsavers/TUHS and source from TUHS where
available.

Ingo points out there are cases where something is included but not
documented until a later release.
bcd(6)		v6	v7
printf(3)	v2	v4
abort(3)	v5	v6
system(3)	v6	v7
fmod(3)		v5	v6

ok schwarze@

2 files changed, 6 insertions, 6 deletions

diff --git a/libexec/getty/getty.8 b/libexec/getty/getty.8
index 70c74ba8bc3..38cc6473077 100644
--- a/libexec/getty/getty.8
+++ b/libexec/getty/getty.8
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: getty.8,v 1.15 2014/11/15 14:41:03 bentley Exp $
+.\"	$OpenBSD: getty.8,v 1.16 2020/02/08 01:09:57 jsg Exp $
 .\" Copyright (c) 1980, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
@@ -28,7 +28,7 @@
 .\"
 .\"     from: @(#)getty.8	8.1 (Berkeley) 6/4/93
 .\"
-.Dd $Mdocdate: November 15 2014 $
+.Dd $Mdocdate: February 8 2020 $
 .Dt GETTY 8
 .Os
 .Sh NAME
@@ -131,4 +131,4 @@ does not exist.
 A
 .Nm
 program appeared in
-.At v6 .
+.At v2 .
diff --git a/libexec/getty/ttys.5 b/libexec/getty/ttys.5
index b992af97877..c3f5d9a562a 100644
--- a/libexec/getty/ttys.5
+++ b/libexec/getty/ttys.5
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ttys.5,v 1.12 2018/09/25 20:02:43 jmc Exp $
+.\"	$OpenBSD: ttys.5,v 1.13 2020/02/08 01:09:57 jsg Exp $
 .\" Copyright (c) 1985, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
@@ -28,7 +28,7 @@
 .\"
 .\"     from: @(#)ttys.5	8.1 (Berkeley) 6/4/93
 .\"
-.Dd $Mdocdate: September 25 2018 $
+.Dd $Mdocdate: February 8 2020 $
 .Dt TTYS 5
 .Os
 .Sh NAME
@@ -168,4 +168,4 @@ ttyp1	none	network	off
 A
 .Nm
 file appeared in
-.At v6 .
+.At v5 .