git ssb

Adds support for sbot server --offline, which launches scuttlebot with all gossip disabled.

I added a tiny commit which removes a TODO comment (translation).

After looking around a little bit I found a few other untranslated strings printed to the console. I guess translation strings are only a thing in Patchwork?

thanks! merged into 9.3.0

we need a toggle that can be turned on and off without restarting the server. I know @johnny wants that.