another streaming tool

howto/conference.md

@@ -321,3 +321,4 @@ Conference-hosting and larger-scale e-learning software:
    provide that paid service.
  * [Owncast](https://github.com/owncast/owncast) - free software Twitch replacement: streaming with
    storage
+ * [Boltstream](https://github.com/benwilber/boltstream) - similar, RTMP, HLS, WebVTT sync, VOD