Fix manpage and usage() to reflect that -a can be used in combination

with -o

Submitted by:	Ruslan Ermilov <ru@FreeBSD.org>
Pointed out by: Ceri Davies <ceri@submonkey.net

sbin/mount/mount.8

@@ -41,6 +41,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl adfpruvw
+.Op Fl o Ar options
 .Op Fl F Ar fstab
 .Op Fl t Ar ufs | external_type
 .Nm

sbin/mount/mount.c

@@ -706,7 +706,7 @@ usage()
 
 	(void)fprintf(stderr, "%s\n%s\n%s\n",
 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
-"       mount [-adfpruvw] [ -F fstab] [-t ufs | external_type]",
+"       mount [-adfpruvw] [-o options] [ -F fstab] [-t ufs | external_type]",
 "       mount [-dfpruvw] special | node");
 	exit(1);
 }