Fix plugin autoload

I was trying to be too smart about holding up IRC messages coming from
plugins while the bot is disconnected.

src/zyklonb.c

@@ -810,9 +810,19 @@ plugin_process_message (const struct irc_message *msg,
 			printf ("%s\n", msg->params.vector[1]);
 		}
 	}
-	else if (plugin->initialized)
+	else if (plugin->initialized && ctx->irc_ready)
 	{
 		// Pass everything else through to the IRC server
+		// XXX: when the server isn't ready yet, these messages get silently
+		//   discarded, which shouldn't pose a problem most of the time.
+		//   Perhaps we could send a "connected" notification on `register'
+		//   if `irc_ready' is true, or after it becomes true later, so that
+		//   plugins know when to start sending unprovoked IRC messages.
+		// XXX: another case is when the connection gets interrupted and the
+		//   plugin tries to send something back while we're reconnecting.
+		//   For that we might set up a global buffer that gets flushed out
+		//   after `irc_ready' becomes true.  Note that there is always some
+		//   chance of messages getting lost without us even noticing it.
 		irc_send (ctx, "%s", raw);
 	}
 }
@@ -872,9 +882,6 @@ on_plugin_readable (const struct pollfd *fd, struct plugin_data *plugin)
 		}
 	}
 
-	// Hold it in the buffer while we're disconnected
-	struct bot_context *ctx = plugin->ctx;
-	if (ctx->irc_fd != -1 && ctx->irc_ready)
 	irc_process_buffer (buf, plugin_process_message, plugin);
 }
 
@@ -1434,6 +1441,7 @@ on_irc_disconnected (struct bot_context *ctx)
 
 	xclose (ctx->irc_fd);
 	ctx->irc_fd = -1;
+	ctx->irc_ready = false;
 
 	// TODO: inform plugins about the disconnect event