Adds disposal mailing guide to disposals
requested to merge pull/14122/learntofuckingusedisposalscargoholyshitwhydoihaveseventeencratesnadtwotonsofgarbageinmybackroom into Bleeding-Edge
Created by: SonixApache
As penned by @uazuaz in #6800 (closed), with a quick grammar check by myself. Adds one book right on top of the destination taggers so YOU HAVE NO EXCUSE Related to #13812 but doesn't close it necessarily.
- rscadd: Disposals now comes with a guide to disposals mailing. No more excuses, cargonians.