This package has no manpage, the -h and -? options of the program give no
output, the expected usage "coredhcp-client eth0" fails, and there's this:
# /usr/bin/coredhcp-client --help
Usage of /usr/bin/coredhcp-client:
#

It's a requirement for every program to have a man page, but this goes beyond
that, there's no form of help or documentation at all.  Even a text file in
/usr/share/doc giving a pointer on how to use it would be a massive
improvement.