This is intended as a lightweight replacement for EkWaitlist, whose code quality and memory consumption leave much to be desired. Configuration of alt-note patterns, whisper squelching, and local echo is done via four variables at the top of the file. I have no plans to add a configuration mechanism, much less saved variables to store them, as the configuration tends to be static anyway.
Syntax help is available in game via the /wl or /waitlist slash commands, or as a whisper response to any string beginning with 'wl '.
Post bugs here. Feature requests will most likely be ignored.
(Oh, and credit goes mostly to Rabbit for SimpleBossWhisperer, whose code I used as a starting point for this addon)