Topic: [Feature] Allow multiple values in range syntax for metatags

Requested feature overview description.
Allow multiple values in range syntax for metatags, so it would be usable like this: "id:1,2,100,1000"

Why would it be useful?
I'm building a lightbox userscript for index pages and it would be both easier for me and would create less load on e621 servers if I could request posts with specific IDs via index endpoint and not load post data one at a time. This is already implemented on danbooru: https://danbooru.donmai.us/posts?tags=id%3A1000%2C2000%2C3000. Currently e621 considers commas as tag delimiters (like space character). I can't use ~ ("or") syntax because index pages contain much more than 6 posts per page.

What part(s) of the site page(s) are affected?
Search (metatags)

Updated by Pup