'mime', 'mediadtype', 'bitdepth'.
Clients that process these fields should first check if 'filemissing' is
set. Fields that are supported even if the file is missing include:
- 'canonicaltitle', ''archivename' (deleted files only), 'descriptionurl',
+ 'canonicaltitle', 'archivename' (deleted files only), 'descriptionurl',
'descriptionshorturl'.
* The 'blockexpiry' result property in list=users and list=allusers will now be
returned in the same format used by the rest of the API: ISO 8601 for