[BUG] "bastille boostrap" gives spurious and wrong warning about "bastille_zfs_enable"

[michael-o]

Describe the bug Running on a UFS-only host. Bootstrapping a new release (13.3-RELEASE):

# bastille bootstrap 13.3-RELEASE
$bastille_zfs_enable is not set properly - see rc.conf(5).
Bootstrapping FreeBSD distfiles...
$bastille_zfs_enable is not set properly - see rc.conf(5).
$bastille_zfs_enable is not set properly - see rc.conf(5).
/usr/local/bastille/cache/13.3-RELEASE/MANIFES        1046  B 9627 kBps    00s
/usr/local/bastille/cache/13.3-RELEASE/base.tx         205 MB 2116 kBps 01m39s
Validated checksum for 13.3-RELEASE: base.txz
MANIFEST: d10531d663cee5efeb7d696ca84ce90adacd1fae14dd249628fb74da0c7c2820
DOWNLOAD: d10531d663cee5efeb7d696ca84ce90adacd1fae14dd249628fb74da0c7c2820
Extracting FreeBSD 13.3-RELEASE base.txz.

Bootstrap successful.
See 'bastille --help' for available commands.

It is not clear why $bastille_zfs_enable is not set properly - see rc.conf(5). is displayed at all, but even if it carries out several problems.

Bastille and FreeBSD version 0.10.20231125 13.3-STABLE 13.3-STABLE 13.3-STABLE

How did you install bastille? (port/pkg/git) pkg

Root Cause

• bastille_zfs_enable is not part of rc.conf. It does not make sense to mention rc.conf(5), more than that it is confusing because the manpage of it does know nothing about bastille. It needs to be removed. I would understand: "see /usr/local/....bastille.conf".
• The default value is empty: https://github.com/BastilleBSD/bastille/blob/3a4ebc63bb84b66d456713e608be86e4cba3b637/usr/local/etc/bastille/bastille.conf.sample#L42
• The check is checkisyesno: https://github.com/BastilleBSD/bastille/blob/3a4ebc63bb84b66d456713e608be86e4cba3b637/usr/local/share/bastille/common.sh#L121-L140
• It is a simple copy and paste error from rc.subr

Fix

• Fix the default value
• change see message