reference <stdarg.h> not <varargs.h>, and separate out the synopsis

for vsyslog(3) from the rest after <stdarg.h>, as per printf(3)/vsprintf(3)

lib/libc/gen/syslog.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: syslog.3,v 1.9 1999/03/22 19:44:46 garbled Exp $
+.\"	$NetBSD: syslog.3,v 1.10 2001/03/14 06:12:35 lukem Exp $
 .\"
 .\" Copyright (c) 1985, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)syslog.3	8.1 (Berkeley) 6/4/93
 .\"
-.Dd June 4, 1993
+.Dd March 14, 2001
 .Dt SYSLOG 3
 .Os
 .Sh NAME
@@ -47,17 +47,17 @@
 .Lb libc
 .Sh SYNOPSIS
 .Fd #include <syslog.h>
-.Fd #include <varargs.h>
 .Ft void
 .Fn syslog "int priority" "const char *message" "..."
 .Ft void
-.Fn vsyslog "int priority" "const char *message" "va_list args"
-.Ft void
 .Fn openlog "const char *ident" "int logopt" "int facility"
 .Ft void
 .Fn closelog void
 .Ft int
 .Fn setlogmask "int maskpri"
+.Fd #include <stdarg.h>
+.Ft void
+.Fn vsyslog "int priority" "const char *message" "va_list args"
 .Sh DESCRIPTION
 The
 .Fn syslog