Commit a variant of the patch from Jacques, avoiding the need for a specific val_kind.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/constructors_with_record5@15516 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Be more liberal for the pattern under a constructor with an inlined argument: allow aliases and or patterns (only reject explicitly the constraint pattern).

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/constructors_with_record5@15517 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
allow_recarg is now interpreted in a strict way for Pexp_ident expression (if true, the variable must be bound to a record argument).

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/constructors_with_record5@15518 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02