Squashed 'sysctl/' content from commit 8d0bcf8

git-subtree-dir: sysctl
git-subtree-split: 8d0bcf83179a59b1bc83c57be143b990c2d395e4
Merge commit 'fa287c6c5c4095ca0dcc68b0eb8179fee52c991c' as 'sysctl'