mention the option of directly fetching the archive files when creating new jails

[albert_fsfe.org]

Summary

Currently, the description only mentions fetching the archives from the ISO, however imho it is more convenient
in some cases to directly fetch them from the mirrors

[bcr]

A few minor nits. I like the use of <replaceable>s to be future proof.

en_US.ISO8859-1/books/handbook/jails/chapter.xml

220

s/Alternativly/Alternatively/

222

You can probably remove this line as the previous one already mentions the mirror, so it should be clear to the reader what to do.

223

Do you need to switch to sh to do the exports or can the default shell also be used here?

[albert_fsfe.org]

i fixed the typo and followed the recommendation to remove redundant information about selecting a mirror

[albert_fsfe.org]

en_US.ISO8859-1/books/handbook/jails/chapter.xml

223

i followed the other example already in this section.
setting the variables should not be a problem in the default shell,
i would have to research how to do the loop.

[bcr]

Looks good now, thanks! I will get this committed soon.