Run steam:start-downloading in background

[ilumos]

Use tmux to start the download job in the background, to enable logging out and checking back later.

[ilumos]

Example:

tmux new-session -d -s "lancache-autofill" "/home/zph/lancache-autofill/lancache-autofill steam:start-downloading" 2> "/home/zph/lancache-autofill/tmux.log"

tmux attach-session -t "lancache-autofill"

[hashworks]

Why? If desired one could always do that by them self, I would avoid any unneeded dependencies.