40network: Copy the customize dhcp config

It is not available to valid the customize dhcp config
/etc/dhclient.conf in the initram environment.

Dracut uses the default follow config to construct the initramfs.

request subnet-mask, broadcast-address, time-offset, routers,
        domain-name, domain-name-servers, domain-search, host-name,
        root-path, interface-mtu;

Copy the customize config to make the config availably in the
initram environment.

Signed-off-by: Minfei Huang <mhuang@redhat.com>

modules.d/40network/module-setup.sh

@@ -79,7 +79,8 @@ install() {
     inst_script "$moddir/netroot.sh" "/sbin/netroot"
     inst_script "$moddir/dhclient-script.sh" "/sbin/dhclient-script"
     inst_simple "$moddir/net-lib.sh" "/lib/net-lib.sh"
-    inst_simple "$moddir/dhclient.conf" "/etc/dhclient.conf"
+    inst_simple -H "/etc/dhclient.conf"
+    cat "$moddir/dhclient.conf" >> "${initdir}/etc/dhclient.conf"
     inst_hook pre-udev 50 "$moddir/ifname-genrules.sh"
     inst_hook pre-udev 60 "$moddir/net-genrules.sh"
     inst_hook cmdline 91 "$moddir/dhcp-root.sh"