Gerrit change 107389[1] adds RevDel support to various API query modules, so for example a user with the 'deletedhistory' right will be able to retrieve the user and summary from prop=revisions.

This will cause some changes:

- list=deletedrevs, list=filearchive, list=recentchanges, and list=watchlist formerly would not return any information at all for entries where any field was revision-deleted. These entries will now be returned. "hidden" indicators will be provided as is done for modules such as prop=revisions. - prop=imageinfo, list=logevents, prop=revisions, and list=usercontribs will now return field values in addition to the "hidden" indicators, if the user has the necessary user rights. - When "hidden" indicators are returned, a new indicator "suppressed" may also be returned to indicate whether suppression was activated. - prop=imageinfo will now return info for revision-deleted files. - list=logevents, when searching by user or title, will no longer skip revisions where the user or title was revision-deleted if the requesting user has the deletedhistory right. - list=usercontributions will now look at the correct user rights (deletedhistory and suppressrevision, not hideuser) to determine whether to hide revision-deleted contributions.

All clients should be updated to expect rows with hidden fields for deletedrevs, filearchive, recentchanges, and watchlist, and clients with advanced permissions should be updated to properly handle (and to not publicly reveal) the data for revision-deleted fields from these modules as well as imageinfo, logevents, revisions, and usercontribs.

These changes will be deployed to WMF wikis with 1.23wmf11, see https://www.mediawiki.org/wiki/MediaWiki_1.23/Roadmap for the schedule.

[1]: https://gerrit.wikimedia.org/r/#/c/107389/