LGTM

As @ngie pointed out, I think the ratio is confusing. For reference, here are how Elixir and RSpec (Ruby) report a test run including skips:

I'm moving this work to https://github.com/freebsd/freebsd-src/pull/1550 where I'm more comfortable working with small commits, and it seems like GitHub is preferred for outside contributors.

Remove additional sources of non-determinism:

Update reproducible.sh to build a clean tree and env

Well, I sure made a major miscalculation... buildworld buildkernel has to be reproducible first :facepalm:

Added some notes to potential reviewers. Done for now, until I get feedback.

• add reproducible.sh to demonstrate usage
• edit release(7) language

Updated release(7). I'd like feedback on content before I get into the nitty-gritty of formatting.

• fix mtree link entry
• verify schg
• do not apply file time when WITHOUT_REPRODUCIBLE_BUILD
• apply for all dist files when run as root

I have wanted a utility that does exactly this. install -C does something similar, but has other stuff I don’t want. So far I just end up scripting cmp(1) to do the check.

I suggest we start with a switch which enables the new solution. That means it does not break stuff for people who upgrade.

In D38826#887279, @dvl wrote:

All jails.conf jail (in /etc/jail.conf, /etc/jail.*.conf and /etc/jail.conf.d/*.conf) start automatically, without the need to define them in jail_list in rc.conf

That will require an UPDATING notice.

AND: perhap a switch[es] to preserve the old behavior and if set, enable the new behavior.

This is my first attempt at a code contribution to FreeBSD... hopefully I'm going about it the right way.