update json syntax section in ARM
The configuration file consists of a single object (often colloquially called a map) started with a curly bracket. It comprises one or more of the “Dhcp4”, “Dhcp6”, “DhcpDdns”, “Control-agent”, and “Netconf” objects. It is possible to define additional elements but they will be ignored.
The specification of several supported elements (e.g. “Dhcp4”, “Dhcp6”) in a single configuration file can be confusing and works badly with the commands that fetch and write new configurations. Support for it will be removed in a future release of Kea, after which each component will require its own configuration file.
since 1.7.10 we do not support this.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information