Fix a bug in freebsd-14.x due to changes in bsdinstall (#1573)

Since FreeBSD 14.0, bsdinstall creates ZFS dataset for `home` rather
than `/usr/home`, see
freebsd/freebsd-src@3bb9230.
This way, the previous workaround was broken, preventing the normal
provisioning of the default Vagrant public keys.

Signed-off-by: Anton Alekseev <anton@alekseev.cc>
Co-authored-by: Corey Hemminger <hemminger@hotmail.com>

packer_templates/http/freebsd/installerconfig

@@ -44,12 +44,22 @@ EOT
 # zfs doesn't use an fstab, but some rc scripts expect one
 touch /etc/fstab
 
+# Since FreeBSD 14.0 bsdinstall again creates dataset for /home rather then /usr/home
+# Thus on versions prior to 14.0 we have to create /home -> /usr/home symlink,
+# otherwise just use /home as the base for vagrant's home
+version=$(freebsd-version -u)
+if [ "${version%%.*}" -lt "14" ]; then
+   home_base="/usr/home"
+   ln -s $home_base /home
+else
+   home_base="/home"
+fi
+
 # Set up user accounts
-echo "vagrant" | pw -V /etc useradd vagrant -h 0 -s /bin/sh -G wheel -d /usr/home/vagrant -c "Vagrant User"
+echo "vagrant" | pw -V /etc useradd vagrant -h 0 -s /bin/sh -G wheel -d ${home_base}/vagrant -c "Vagrant User"
 echo "vagrant" | pw -V /etc usermod root
 
-mkdir -p /usr/home/vagrant
-chown 1001:1001 /usr/home/vagrant
-ln -s /usr/home /home
+mkdir -p ${home_base}/vagrant
+chown 1001:1001 ${home_base}/vagrant
 
 reboot