* Added "api" config to JSON format
* Added "api-interface" and "api-port" options to Conf format
* Added "--auto-reload" flag to the command line program
* Added "--test" flag to the command line program
* Added FFIs leaf_run(), leaf_reload(), leaf_shutdown(), leaf_test_config()
* Removed FFI run_leaf()
* Added Web APIs:
* POST /api/v1/runtime/reload
* POST /api/v1/runtime/shutdown