- remove " from within path. keep complete path in one "path/file", because it is much better to read and also protects any spaces (which shouldnt be use for file names anyway )

This allows to (ex/in)clude spezific clients

  when value has an "=" "nvram get" had returned an emtpy value.
  e.g.: wireguard_secret=APZiy5Wp3G9XzHOLbREC4T3e9CrUXjwDj02QzyPsIns==
- convert wireguard_secret (if present)

  when value has an "=" "nvram get" had returned an emtpy value.
  e.g.: wireguard_secret=APZiy5Wp3G9XzHOLbREC4T3e9CrUXjwDj02QzyPsIns==
- convert wireguard_secret (if present)

fastd2: 'secure handshakes' configuration is deprecated, insecure handshakes are not supported anymore