in MW 1.20 (saving preferences using Special:Preferences cleared any
additional fields) and which has been disabled in 1.20.1 as a part of
a security fix (bug 42202).
+* Added option to specify "others" as author in extension credits using
+ "..." as author name.
* Added the ability to limit the wall clock time used by shell processes,
as well as the CPU time. Configurable with $wgMaxShellWallClockTime.
* Allow memory of shell subprocesses to be limited using Linux cgroups