Adjust history, info source from v1's manuals

https://www.bell-labs.com/usr/dmr/www/1stEdman.html

MFC after:	5 days

lib/libc/compat-43/creat.2

@@ -28,7 +28,7 @@
 .\"     @(#)creat.2	8.1 (Berkeley) 6/2/93
 .\" $FreeBSD$
 .\"
-.Dd June 2, 1993
+.Dd September 4, 2019
 .Dt CREAT 2
 .Os
 .Sh NAME
@@ -59,4 +59,4 @@ open(path, O_CREAT | O_TRUNC | O_WRONLY, mode);
 The
 .Fn creat
 function appeared in
-.At v6 .
+.At v1 .

usr.bin/dc/dc.1

@@ -35,7 +35,7 @@
 .\"
 .\"	@(#)dc.1	8.1 (Berkeley) 6/6/93
 .\"
-.Dd December 5, 2017
+.Dd September 4, 2019
 .Dt DC 1
 .Os
 .Sh NAME
@@ -537,7 +537,7 @@ specification.
 The
 .Nm
 command first appeared in
-.At v6 .
+.At v1 .
 A complete rewrite of the
 .Nm
 command using the

usr.bin/sort/sort.1.in

@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)sort.1	8.1 (Berkeley) 6/6/93
 .\"
-.Dd March 19, 2015
+.Dd September 4, 2019
 .Dt SORT 1
 .Os
 .Sh NAME
@@ -607,7 +607,7 @@ and are still supported but their use is highly discouraged.
 A
 .Nm
 command first appeared in
-.At v3 .
+.At v1 .
 .Sh AUTHORS
 .An Gabor Kovesdan Aq Mt gabor@FreeBSD.org ,
 .Pp