Allow headless servers to automatically update.

[keyedout]

TL;DR

Add a command line flag that automatically fetches updates and applies them.

What?

To allow for easier updating of headless servers, a command-line flag like --update or --auto-update should be added that automatically fetches the newest version of the game from the update api. Here are two scripts that I found that accomplish this: https://github.com/robertvalik/factorio.updater and https://github.com/narc0tiq/factorio-updater

Why?

Currently to update a headless Factorio server you have to either download the newer version from the website and move all your saves and settings over and then delete the older version or to use one of the scripts I mentioned above. This new feature would make it much more convenient and faster to update headless Factorio servers.