PR#5851: refine 4.02@15111 to print the hint at most once

(Report by Jonathan Protzenko, ack'ed by Damien Doligez)

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15127 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Expose Obj.extension_slot (Jérémie Dimino, ack'ed by Damien)

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15128 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
improve Changelog

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15129 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Typo in PR number 5905

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15130 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
two small typos

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15132 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
use Env.scrape_alias in Envaux too

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15135 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
PR#5851: fix merge error

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15136 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
New -strict-formats flag to detect and fix invalid formats

(Request by Mark Shinwell, ack'ed by Damien Doligez)

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15138 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
add ocamlbuild support for '-open M' and -strict-formats

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15140 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
late-commit of forgotten ocamlbuild tags

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15143 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
PR#6523: character bigarray access and ordering

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15148 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
reorder bug fix

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15150 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
last commit before tagging 4.02.0

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15152 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
increment version number after tagging 4.02.0

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15155 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Use module_binding in Pexp_letmodule / Texp_letmodule
Introduce Asttypes.arrow_flag to encode labelled arguments
Split arrow_flag into Parsetree.arrow_flag and Types.arrow_flag
Remove Typedtree.optional, as its purpose was redundant.
WIP: refining arrow_flag with apply_flag
Introduce Asttypes.arrow_flag to encode labelled arguments