Community Wishlist Survey 2022/Ability to change wiki subdomain without a phabricator task

Status: ✅

Proposed by Anpang

Proposal summary: Make changing wiki subdomain possible

Full proposal: It's sometimes annoying that a phabricator task is required to change the wiki subdomain. Suggestion is to add a new textbox to ManageWiki which can be used to change the wiki subdomain (and database name of course).