The '/etc/sysconfig/[dhcpd|dhcpd6|dhcrelay]' files used for specifying user's 
customization arguments are deprecated in Red Hat Enterprise Linux 7. Instead, these arguments can
be specified in the '[dhcpd|dhcpd6|dhcrelay].service' files on the 'ExecStart' line.

The specified arguments are automatically moved from the /etc/sysconfig/*
files into *.service files during upgrade. Check if they are moved
correctly, and everything works as expected.


