resolvconf(8) on FreeBSD
The text b5d4ae504a45, as FreeBSD 10.1-RELEASE, FreeBSD 10.0-RELEASE, FreeBSD 9.3-RELEASE, FreeBSD 9.2-RELEASE, FreeBSD 9.1-RELEASE, FreeBSD 9.0-RELEASE shipped it.
a framework for managing multiple DNS configurations
Flags it lists
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-I -
-f -
-i -
-l -
-m -
-p -
-u -
-v