Review for part 2 packages

Hi all,

I have reviewed OpenDocument-v1.3-wd06-part2-packages

Issues 3858, 3859, 3866, 3869, 3870, 3875 are OK for me.

Issue 3871 has a wrong "/", reopened.
Issue 3868 the new MIME type reference is not yet adapted in the text
Issue 3867 I'm not sure, see mail "encryption - signature"