When persistent is not specified, dhcpcd de-configures the interface at exit.
However, the default dhcpcd.conf example provided enables the option.
See https://github.com/NetworkConfiguration/dhcpcd/discussions/140
.Pa @SCRIPT@ .
.It Fl p , Fl Fl persistent
.Nm
-normally de-configures the
+de-configures the
.Ar interface
-when it exits.
+when it exits unless this option is enabled.
Sometimes, this isn't desirable if, for example, you have root mounted over
NFS or SSH clients connect to this host and they need to be notified of
the host shutting down.