option( 'policy-default', type: 'combo', choices: [ 'auto', 'allow-all', 'deny-all', 'rba' ], value: 'allow-all', description: 'Default policy when no specific policy was set' ) option( 'grpc-proxy', type: 'boolean', value: true, description: 'Build gRPC proxy which exposes some of the agl-shell protocol over a gRPC API' )