Document create_output and unplug in man pages

[CheerfulPianissimo]

Documents the commands for using virtual inputs in the manual pages.

[emersion]

This is intentional, see #5553

[CheerfulPianissimo]

Ah, sorry, did not see that issue. This comment of yours seems to indicate otherwise though?

[emersion]

That's true.

I do wonder if we can find a better name than create_output. We could go for output create but that would be a bit inconsistent with the way it works right now.

[omeid]

@emersion Is it possible to let the user select the display name so that something like output ONTHEWALL create could work?

[emersion]

I'd rather not. The name picked by the user may clash with real output names (current or future), which would be tricky to handle.

[omeid]

I'd rather not. The name picked by the user may clash with real output names (current or future), which would be tricky to handle.

This is a fair point. I don't mind a predefine prefix like VIRTUAL-*. But allowing user to select the name enables having configuration in the config file. Right now, it is a bit tricky, specially if you unplug a display and then want to recreate it.