In 19.7 Additional Resources, "ZFS Best Practices Guide" and "ZFS Evil Tuning Guide" links to an invalid website.
A commit references this bug: Author: carlavilla Date: Sun Jan 26 13:07:43 UTC 2020 New revision: 53826 URL: https://svnweb.freebsd.org/changeset/doc/53826 Log: Update links on ZFS additional resources PR: 222441 Submitted by: frank.ebert@freenet.de Path by: carlavilla@ Approved by: bcr@(mentor) Differential Revision: https://reviews.freebsd.org/D23358 Changes: head/en_US.ISO8859-1/books/handbook/zfs/chapter.xml
Fixed.