MFC:

1.207:
	Add "errmsg" to list of global mount options.

1.225:
	Add "update" mount option to global_opts array,
	for use with vfs_filteropt().

sys/kern/vfs_mount.c

@@ -127,6 +127,7 @@ struct vnode	*rootvnode;
  * Global opts, taken by all filesystems
  */
 static const char *global_opts[] = {
+	"errmsg",
 	"fstype",
 	"fspath",
 	"rdonly",
@@ -134,6 +135,7 @@ static const char *global_opts[] = {
 	"rw",
 	"suid",
 	"exec",
+	"update",
 	NULL
 };