Community Wishlist Survey 2023/Enable non-interactive backups by wiki admins

Proposed by Rob Kam

Proposal summary: Provide wiki admins with a non-interactive method for backing up wikis

Full proposal: Special:DataDump is too interactive - having to click once each for XML, files and managewiki files, then having to wait for these to be ready and be manually downloaded through the browser. The wiki admin (or priveleged users) should be able to run a command from a batch file or shell script that fetches a backup of their wiki(s) XML and files. A bonus enhancement would for the admin to be able to download only the changes and merge them into the previous download.