fix the wrong usage of strtok() in fsname_is_auto()
fix the wrong usage of strtok() in fsname_is_auto()

I am stupid. fsname_is_auto() can't use strtok(), the 2nd call will
see zeroes instead of commas in fsauto_names.

Add the css_contains() helper and change fsname_is_auto() to use it.

Signed-off-by: Oleg Nesterov <20b70f0af00562e63758b9ee42012ecc96c58590@redhat.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

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