The test 71 is about iSCSI and has nothing to do with NBD. There is no
`/tmp/config`.
So do not try to include it in the initrd.
-d "iscsi_tcp crc32c ipv6 af_packet" \
-I "ip grep sleep setsid chmod modprobe pidof tgtd tgtadm" \
--install-optional "/etc/netconfig dhcpd /etc/group /etc/nsswitch.conf /etc/rpc /etc/protocols /etc/services /usr/etc/nsswitch.conf /usr/etc/rpc /usr/etc/protocols /usr/etc/services" \
- -i /tmp/config /etc/nbd-server/config \
-i "./dhcpd.conf" "/etc/dhcpd.conf" \
-f "$TESTDIR"/initramfs.root
mkdir -p "$TESTDIR"/server-rootfs