lightningd/plugin: extend plugins->startup window to include plugins_config

Fixes incorrect configuration[`startup`] in plugin `init`, modified tests
to test this.

lightningd/plugin.c

@@ -1019,8 +1019,6 @@ void plugins_init(struct plugins *plugins, const char *dev_plugin_debug)
 
 	if (plugins->pending_manifests > 0)
 		io_loop_with_timers(plugins->ld);
-	// There won't be io_loop anymore to wait for plugins
-	plugins->startup = false;
 }
 
 static void plugin_config_cb(const char *buffer,
@@ -1074,6 +1072,8 @@ void plugins_config(struct plugins *plugins)
 			plugin_config(p);
 		}
 	}
+
+	plugins->startup = false;
 }
 
 void json_add_opt_plugins(struct json_stream *response,

tests/plugins/dblog.py

@@ -20,7 +20,7 @@ def init(configuration, options, plugin):
         plugin.conn.execute(c)
         plugin.log("{}".format(c))
     plugin.initted = True
-    plugin.log("initialized")
+    plugin.log("initialized {}".format(configuration))
 
 
 @plugin.hook('db_write')

tests/plugins/slow_init.py

@@ -7,7 +7,7 @@ plugin = Plugin()
 
 @plugin.init()
 def init(options, configuration, plugin):
-    plugin.log("slow_init.py initializing")
+    plugin.log("slow_init.py initializing {}".format(configuration))
     time.sleep(1)
 
 

tests/test_plugin.py

@@ -98,7 +98,7 @@ def test_plugin_slowinit(node_factory):
     n = node_factory.get_node()
 
     n.rpc.plugin_start(os.path.join(os.getcwd(), "tests/plugins/slow_init.py"))
-    n.daemon.wait_for_log("slow_init.py initializing")
+    n.daemon.wait_for_log("slow_init.py initializing.* 'startup': False")
 
     # It's not actually configured yet, see what happens;
     # make sure 'rescan' and 'list' controls dont crash
@@ -304,7 +304,7 @@ def test_db_hook(node_factory, executor):
     l1.daemon.wait_for_log('plugin-dblog.py replaying pre-init data:')
     l1.daemon.wait_for_log('plugin-dblog.py PRAGMA foreign_keys = ON;')
     l1.daemon.wait_for_log('plugin-dblog.py CREATE TABLE version \\(version INTEGER\\)')
-    l1.daemon.wait_for_log('plugin-dblog.py initialized')
+    l1.daemon.wait_for_log("plugin-dblog.py initialized.* 'startup': True")
 
     l1.stop()