input: added input plugin flag for plugins that expose listeners
#define FLB_INPUT_PRIVATE 256 /* plugin is not published/exposed */
#define FLB_INPUT_NOTAG 512 /* plugin might don't have tags */
#define FLB_INPUT_THREADED 1024 /* plugin must run in a separate thread */
+#define FLB_INPUT_NET_SERVER 8 /* Input address may set host and port.
+ * In addition, if TLS is enabled then a
+ * private key and certificate are required.
+ */
/* Input status */
#define FLB_INPUT_RUNNING 1
