BUR #3302 has been approved by @evazion.
mass update quetzalcoatl -> quetzalcoatl_(mythology)
Adding qualifier, so Quetzalcoatl will be a disambiguation page, and there's a good number of tags with this name.
EDIT: The bulk update request #3302 (forum #171626) has been approved by @evazion.
Updated by DanbooruBot