No need to announce milestones by hand, br.enter has that covered.

Conflicts:
	crawl-ref/source/dat/des/portals/bazaar.des
	crawl-ref/source/dat/des/portals/hive.des
	crawl-ref/source/dat/des/portals/trove.des
	crawl-ref/source/dat/des/portals/volcano.des