Make /etc a separate dataset

For ease of fixing mis-configurations and other events leading to potential system corruption, the /etc dir would benefit from being covered by their own unique snapshots so that any problems can be easily rolled back atomically without affecting the rest of the filesystem

src-sh/void-install-zfs.sh

@@ -406,15 +406,15 @@ exit_err $? "Could not import the new pool at ${MNT}"
 zfs mount ${ZPOOL}/ROOT/${INITBE}
 exit_err $? "Count not mount the root ZFS dataset"
 
-datasets="home:usr/home vlog:var/log vtmp:var/tmp docker:var/lib/docker"
+datasets="home:usr/home vlog:var/log vtmp:var/tmp docker:var/lib/docker etc:etc"
 for ds in ${datasets}
 do
   echo "Creating Dataset: ${ds}"
   zfs create -o compression=lz4 -o mountpoint=/$(echo ${ds} | cut -d : -f 2) ${ZPOOL}/$(echo ${ds} | cut -d : -f 1)
   exit_err $? "Could not create dataset: ${ds}"
 done
 
-dirs="boot/grub boot/efi dev etc proc run sys"
+dirs="boot/grub boot/efi dev proc run sys"
 for dir in ${dirs}
 do
   mkdir -p ${MNT}/${dir}