buildroot/package/mstpd/Config.in

config BR2_PACKAGE_MSTPD
	bool "mstpd"
	help
	  Multiple Spanning Tree Protocol Daemon.
	  This package provides a user-space daemon which replaces
	  the STP handling that is built into the Linux kernel Ethernet
	  bridge and adds support for RSTP and PVST+.

	  https://github.com/mstpd/mstpd