Converges titles to imperative-form, front-matter based, and sentence-case (#438)

Multiple title fixes, consistency fixes, convergence into metadata-based titles.

engine/security/https.md

@@ -5,14 +5,9 @@ aliases:
 description: How to setup and run Docker with HTTPS
 keywords:
 - docker, docs, article, example, https, daemon, tls, ca,  certificate
-menu:
-  main:
-    parent: smn_secure_docker
 title: Protect the Docker daemon socket
 ---
 
-# Protect the Docker daemon socket
-
 By default, Docker runs via a non-networked Unix socket. It can also
 optionally communicate using an HTTP socket.