Granting wish #3014:
  Hint Rewrite should allow multiple databases.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16512 85f007b7-540e-0410-9357-904b9bb8a0f7
Documenting the previous commit.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16513 85f007b7-540e-0410-9357-904b9bb8a0f7