fsdb(8) on OpenBSD

The text 5239959a8b5d, as OpenBSD 4.0, OpenBSD 3.9, OpenBSD 3.8, OpenBSD 3.7, OpenBSD 3.6, OpenBSD 3.5, OpenBSD 3.4, OpenBSD 3.3 shipped it.

FFS debugging/editing tool

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