On Thursday 19 November 2015 10:49:08 Peter Humphrey wrote:
>Hello list,
>
[...]
>
>What's more, earlier versions had a decent man page and heavily commented
>chronyd.conf, but now the chrony.conf man page has been cut to a bare
>minimum and instead refers to a file chrony.txt "included in the
>distribution". I cannot find any such file after running ebuild $(equery w
>chrony) prepare.

You've already gotten an answer regarding the man page, but with regards to 
the configuration file in /etc, it looks like what you are looking for is in 
the standard documentation path:

% qlist chrony | grep doc/
/usr/share/doc/chrony-2.2/README
/usr/share/doc/chrony-2.2/NEWS
/usr/share/doc/chrony-2.2/FAQ
/usr/share/doc/chrony-2.2/chrony.conf.example1
/usr/share/doc/chrony-2.2/chrony.conf.example2
/usr/share/doc/chrony-2.2/chrony.conf.example3
/usr/share/doc/chrony-2.2/chrony.keys.example

The *.example3 file is apparently the one that used to be copied to /etc.

HTH
-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup