• Multi: Include hostID in notice/critical messages for backup server startup.
• Satellite Upgrade Script: Unset "__daemon" variable (used by pixl-server)
• Multi: When spawning shell for background commands, remove "__daemon" var (used by pixl-server).
• Satellite Upgrade Script: Unset "__daemon" env var so pixl-server properly forks (for non-docker installs)
• Install Script: Improve output, and remove old unused code.
• Comm/Multi: Add sanity checks on websocket data format, in case remote side is still on an older version.