dhcp6c(8) on Linux
The text d5e6616523a9, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
DHCPv6 client daemon
Flags it lists
-
-D -
-P -
-c -
-d -
-f -
-i -
-p