Correct the history of apropos(1), whatis(1) and whereis(1): These

utilities were already part of 2BSD. Also credit Bill Joy as the author.
Document the HISTORY of options.
Say a bit more about the fate of whereis(1).
All information found on http://minnie.tuhs.org/cgi-bin/utree.pl
and in the OpenBSD, NetBSD, and FreeBSD CVS trees.
Using feedback from jmc@.

1 files changed, 7 insertions, 3 deletions

diff --git a/usr.bin/which/which.1 b/usr.bin/which/which.1
index 55a05e42dbf..13430e6bf16 100644
--- a/usr.bin/which/which.1
+++ b/usr.bin/which/which.1
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: which.1,v 1.21 2010/09/29 07:44:57 jmc Exp $
+.\"	$OpenBSD: which.1,v 1.22 2011/10/09 02:20:39 schwarze Exp $
 .\"
 .\" Copyright (c) 1980, 1991 Regents of the University of California.
 .\" All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     from: @(#)which.1	6.3 (Berkeley) 4/23/91
 .\"
-.Dd $Mdocdate: September 29 2010 $
+.Dd $Mdocdate: October 9 2011 $
 .Dt WHICH 1
 .Os
 .Sh NAME
@@ -93,5 +93,9 @@ though with a different syntax.
 .Sh HISTORY
 A
 .Nm
-command appeared in
+command first appeared in
 .Bx 3.0 .
+The
+.Fl a
+option first appeared in
+.Ox 2.3 .