Updated mediawiki/extensions Project: mediawiki/extensions/WikimediaMaintenance 8a40736f988df3ad911893a9bfee1f9a59389595
renameInvalidUsernames: Don't try to check if username is valid
Due to T98757, an invalid username on a certain wiki isn't necessarily
invalid on metawiki (where the script is run). Just assume the list was
created recently and users won't have had their name changed since then.
Also lower the number of concurrent renames.