plugins - started basic plugin system

confs/site/main-lua.conf

@@ -291,6 +291,15 @@ if use_antibot_recaptcha and ngx.var.uri ~= "/favicon.ico" then
 	end
 end
 
+-- plugins check
+local plugins, flags = ngx.shared.plugins_data:get("plugins")
+if plugins ~= nil then
+	for plugin_id in string.gmatch(plugins, "%w+") do
+		local plugin = require(plugin_id .. "/" .. plugin_id)
+		plugin.check()
+	end
+end
+
 ngx.exit(ngx.OK)
 
 }