partially fix stream test; add missing /announce
partially fix stream test; add missing /announce

jamesliu96/webtorrent,joshterrill/webtorrent,feross/webtorrent,jamesliu96/webtorrent,webtorrent/webtorrent,webtorrent/webtorrent,yciabaud/webtorrent,yciabaud/webtorrent,arestov/webtorrent,joshterrill/webtorrent,feross/webtorrent,rom1504/webtorrent