Requires entries 'sslKeystorePathname' and 'sslKeystorePassword'
in settings.json.
With SSL enabled, API will auto-detect HTTP or HTTPs on the same port.
Included tools/build-keystore.sh to help build keystore from
Let's Encrypt certificates.
Instead of working on a single 'auto-update' branch,
that needed to be rebased from master branch's HEAD,
we create an orphan branch named after master:HEAD
containing on the update file.
This allows us to keep/delete updates on a per-commit
basis and shows which commit each update is based upon.
Added loads more checking.
