Create a new page like the Privacy or Appearance pages but for Wiki details.
All these changes will be emailed.
Needs to include the following options:
- Rename Wiki - Needs to have a box to type the new name in.
- Move Wiki - Needs to have a box to type what you want it moved to.
- Delete Wiki - some sort of check to ensure they actually want to delete the wiki is probably needed - definitely don't have this automatically set!
- @cook879 suggested you could reuse the modal box, since I imagine you enjoyed making it so much...
Add a box to describe why they want it changed / a check that they have community consensus.
You can probably get away with extending SpecialFormPage like the Privacy.php file does.