cd /usr/src/distrib/amd64/ramdisk_cd/rdsshd
make -f Makefile.rdsshd prepare-unpatch-rdsshd

cd /usr/src
patch -R -p1 < /root/bsdsshd.rd.patch
# Replace /usr/obj below if prepare-unpatch-rdsshd printed another path.
rmdir /usr/obj/distrib/amd64/ramdisk_cd/rdsshd
rmdir /usr/src/distrib/amd64/ramdisk_cd/rdsshd