We need to pass through setconfig in check mode, then we need to have libplugin add (and use!) a `check_only` parameter to all option setting. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Changelog-Added: JSON-RPC: `check` `setconfig` on plugin options can now check the config value would be accepted.
Plugin Directory
Any file in this directory which is executable and whose name only consists of alphanumeric characters, space, '.', '-' or '_' will be automatically loaded when lightningd starts (unless suppressed with commandline options).