swab(3) on FreeBSD

The text f0a215d28225, as FreeBSD 5.4-RELEASE, FreeBSD 5.3-RELEASE, FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE, FreeBSD 5.0-RELEASE shipped it.

swap adjacent bytes

swab(3) on FreeBSD now