slaacctl(8) on OpenBSD
The text f736147cf038, as OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4 shipped it.
control the slaacd daemon
Flags it lists
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-s