Consistently use .Va for "errno";

patch from Jan Stary <hans at stare dot cz>;
"I think it makes sense to speak about errno as a variable (.Va)" jca@.

diff --git a/lib/libc/sys/intro.2 b/lib/libc/sys/intro.2
index 333fa90..b888c3e 100644 (file)
--- a/lib/libc/sys/intro.2
+++ b/lib/libc/sys/intro.2
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: intro.2,v 1.65 2017/09/05 03:06:26 jsg Exp $
+.\"    $OpenBSD: intro.2,v 1.66 2017/12/12 18:41:44 schwarze Exp $
 .\"    $NetBSD: intro.2,v 1.6 1995/02/27 12:33:41 cgd Exp $
 .\"
 .\" Copyright (c) 1980, 1983, 1986, 1991, 1993
@@ -30,7 +30,7 @@
 .\"
 .\"     @(#)intro.2    8.3 (Berkeley) 12/11/93
 .\"
-.Dd $Mdocdate: September 5 2017 $
+.Dd $Mdocdate: December 12 2017 $
 .Dt INTRO 2
 .Os
 .Sh NAME
@@ -51,7 +51,7 @@ Programs may be restricted to a subset of system calls with
 .\"<more later...>
 .Sh DIAGNOSTICS
 Nearly all of the system calls provide an error number via the identifier
-.Dv errno ,
+.Va errno ,
 which expands to an addressable location of type
 .Vt int .
 The address of