Add EXCEPT to labels and slots and sides

[TeamDman]

https://discord.com/channels/967118679370264627/967119184209264790/1392361974918283284

Hullah — 12:29 AM How do you output to a label but not if it has another label? I want something like the following where a single machine has both labels dest and dest_alt: INPUT from source OUTPUT to dest EXCEPT dest_alt

me: not a feature yet but it should be :o