User:Ris/wip/Gentoo evolution

When gentoo changes things, legacy installs can hang around with the old ways for some time. Users can be surprised when packages are renamed, paths changed, sets modified, services changed etc. upon updating.

List here what has changes over time, and stop constantly referring to how things used to be done, years ago.

for older installs, now.

https://gitweb.gentoo.org/proj/portage.git/commit/cnf/repos.conf?id=ef8469befbd7b61f1bae8f21ffd95e0c0306a4f8