sync with trunk

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@5015 0b2b3880-5936-4365-a048-eb17d2e5a6bf
copy svn properties from trunk


git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@5016 0b2b3880-5936-4365-a048-eb17d2e5a6bf
sync wiht trunk

git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@5020 0b2b3880-5936-4365-a048-eb17d2e5a6bf
copy svn properties from trunk


git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@5022 0b2b3880-5936-4365-a048-eb17d2e5a6bf