Squashed 'net/librarybox/' content from commit 4b94cdf

git-subtree-dir: net/librarybox
git-subtree-split: 4b94cdf393baf864f311b54ec94b01386c8dc3b4
Merge commit '13da70d797a876b05b263755f7324c3b6e2540a6' as 'net/librarybox'