Squashed 'libdttp/' content from commit db2e4bb

git-subtree-dir: libdttp
git-subtree-split: db2e4bbc1565c47bb1a00d89ca752089d4f756e4
Merge commit '9e426e05d6f22c3152f5dd632ef2f42c2743f3b2' as 'libdttp'