Use "ifconfig -l" instead of "list_network_interfaces all" in ifnet_rename() to support situations where rc.conf's $network_interfaces variable is set to an explicit list of network interfaces (instead of the default "auto").
Use "ifconfig -l" instead of "list_network_interfaces all" in
ifnet_rename() to support situations where rc.conf's $network_interfaces
variable is set to an explicit list of network interfaces (instead of
the default "auto").

Using "list_network_interfaces all" resulted in using
$network_interfaces for both interface _renaming_ and interface
_configuration_ which obviously cannot work either before (if the
new name is in $network_interfaces) or after (if the old name is in
$network_interfaces) renaming the interface.

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