Mattermost Plugins in Beta! (Server v4.4.0)

Is there documentation for all the plugin related config keys? These for instance:

  "PluginSettings": {
        "Enable": true,
        "EnableUploads": true,
        "Directory": "./plugins",
        "ClientDirectory": "./client/plugins",
        "Plugins": {},
        "PluginStates": {
            "com": {
                "Enable": true

Two of us seem to be having the exact same problem at the moment: Custom Plugin not found after upload/activation.