Tagging release 4.01.0


git-svn-id: http://caml.inria.fr/svn/ocaml/release/4.01.0@14095 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
add back PR#6164, which was erased from Changes by mistake

git-svn-id: http://caml.inria.fr/svn/ocaml/release/4.01.0@14097 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
fix mention of two pseudonymous users in Changes

git-svn-id: http://caml.inria.fr/svn/ocaml/release/4.01.0@14099 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
merge last-minute changes from 4.01.0

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@14115 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02