FreeBSD Port: isc-dhcp41-server-4.1.2,1; Concurrent IPv4 DHCP and DHCPv6

[Freddie Cash]

The OpenVPN port does a pretty good job of this.  Default rc.d script
is just openvpn.  But you can create manual symlinks to it using
openvpn_somename, and it checks rc.conf for openvpn_somename_enable.

Having to manually create the symlink is kind of needed in the openvpn
setup and can lead to left-over files on port removal, but wouldn't be
needed for dhcpd.

Might want to look through the openvpn rc script for ideas.
-- 
Freddie Cash
fjwcash at gmail.com