Support files for launching dinit from /etc/rc.d/ on FreeBSD

To install dinit on FreeBSD, run the following commands as root inside this directory:

```
# (Optional) Install build dependencies
pkg install -y gmake rsync

# Build dinit
pushd ../..
./configure
gmake -j
gmake install
popd

# Install dinit as rc.d service. Make sure you are in the containing directory of this README file.
rsync -r tree/ /
mkdir -p /etc/dinit.d/boot.d

# enable dinit (to start on next boot)
/etc/rc.d/dinit enable
# start dinit now
/etc/rc.d/dinit start
```
