Strengthen warnings about ext4

[ceri]

Summary

Helder Novais pointed out on July 9th via the [e-mail] list that the note about journalling on ext4 was not strong enough.

Fix that (and, while here, add ext4 to the FAQ).

[pauamma_gundo.com]

documentation/content/en/books/handbook/filesystems/_index.adoc

96

Is that warning applicable to base system support, to sysutils/fusefs-ext2, or both? (Given its position in the text and with no indication of scope, it reads as applicable to sysutils/fusefs-ext2 only.)

[ceri]

Clarify situation muddied by mention of the port.

[ceri]

documentation/content/en/books/handbook/filesystems/_index.adoc

96

Clarified; thanks. It's supposed to apply to both. I want to discourage people from using read-write support at all, I think.

[pauamma_gundo.com]

documentation/content/en/books/handbook/filesystems/_index.adoc

96

I see you also removed "Starting with FreeBSD 12.1-RELEASE, a DTrace provider will be available as well." but the review summary doesn't explain why. Accidental overdeletion?

[ceri]

documentation/content/en/books/handbook/filesystems/_index.adoc

96

It wasn't appropriate for a WARNING, so I moved it higher up - see new line 89.

[pauamma_gundo.com]

documentation/content/en/books/handbook/filesystems/_index.adoc

96

Oh, right, missed it.

[bcr]

Looks good to me now.

[pauamma_gundo.com]

I completely forgot about that. Sorry.