/etc/rbootd.conf is in rbootd 2.0-10build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # /etc/rbootd.conf: provides machines with remote boot loaders
# see rbootd(8) for further information:
#
#
# Format:
# ethernet address bootfile
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