With nsupdate the rule seems to be: filenames need to be wrapped
in double quotes, while all other options must not use double quotes.
Hence there is no way to resolve the shellcheck offense, because
the key requires quotes, but the other options must not use quotes.
- Removed or moved `_normalizeJson` processing to occur only when needed.
- Corrected usage of `_red` to `__red`.
- Simplified JSON parsing by using more concise `cut` commands.
- Simplify token refresh logic.
The MIAB API requires that the txtvlaue to a TXT record includes the "value=" and "ttl=" components as part of the TXT record when adding a new record.
Ubiquiti removed keytool (and java) from recent releases of Unifi OS. This moves from keytool to openssl's native pkcs12.
Tested on Unifi Dream Machine which runs Unifi OS and a built-in Unifi controller.
Also added backup of existing files prior to change in case anything goes wrong, and update system configuration with compatible ciphers.