Fix missing '-' for the flags -s and -d on both manpage and usage.

Reported by:	garga, bde

bin/hostname/hostname.1

@@ -29,7 +29,7 @@
 .\"	@(#)hostname.1	8.2 (Berkeley) 4/28/95
 .\" $FreeBSD$
 .\"
-.Dd November 9, 2016
+.Dd November 10, 2016
 .Dt HOSTNAME 1
 .Os
 .Sh NAME
@@ -38,7 +38,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl f
-.Op Fl s|d
+.Op Fl s | d
 .Op Ar name-of-host
 .Sh DESCRIPTION
 The

bin/hostname/hostname.c

@@ -108,6 +108,6 @@ static void
 usage(void)
 {
 
-	(void)fprintf(stderr, "usage: hostname [-f] [s|d] [name-of-host]\n");
+	(void)fprintf(stderr, "usage: hostname [-f] [-s | -d] [name-of-host]\n");
 	exit(1);
 }