dhcpcd-discuss

ok, I didnt notice the there was a dhcpcd.conf man. now I am trying to
assemble it:
I want it to discover eth0 and ppp0 which are connected to the WAN , so
I banish the others:

denyinterfaces eth1 wlan2 tap0 br0

but when I try to run this from the command line, I get:
# pkill dhcp
 # /sbin/dhcpcd 
dhcpcd[9643]: version 5.2.9 starting
dhcpcd[9643]: eth0: rebinding lease of <IP address>
dhcpcd[9643]: eth0: acknowledged <IP address> from <ISP server>
dhcpcd[9643]: eth0: checking for <IP address>
dhcpcd[9643]: eth0: leased <IP address> for 85962 seconds
dhcpcd: eth0: MTU set to 576
/sbin/rc-service: invalid option -- 'D'
Usage: rc-service [options] 

Options: [e:ilr:Chqv]
  -e, --exists <arg>                tests if the service exists or not
  -i, --ifexists                    if the service exsits then run the
  command
  -l, --list                        list all available services
  -r, --resolve <arg>               resolve the service name to an init
  script
  -h, --help                        Display this help output
  -C, --nocolor                     Disable color output
  -v, --verbose                     Run verbosely
  -q, --quiet                       Run quietly
/sbin/rc-service: invalid option -- 'D'
Usage: rc-service [options] 

Options: [e:ilr:Chqv]
  -e, --exists <arg>                tests if the service exists or not
  -i, --ifexists                    if the service exsits then run the
  command
  -l, --list                        list all available services
  -r, --resolve <arg>               resolve the service name to an init
  script
  -h, --help                        Display this help output
  -C, --nocolor                     Disable color output
  -v, --verbose                     Run verbosely
  -q, --quiet                       Run quietly
dhcpcd[9643]: forked to background, child pid 9735


hmm, why is it adding -D :
in /lib/dhcpcd/dhcpcd-run-hooks line 156:

# Send a command to a system service
service_cmd()
{
	/sbin/rc-service $1 -- -D $2
}

is this right?