groupBy/chunkBy redux

[via Digitalmars-d]

On Sunday, 15 February 2015 at 19:42:16 UTC, Andrei Alexandrescu 
wrote:
> On 2/15/15 11:34 AM, Peter Alexander wrote:
>>
>> https://issues.dlang.org/show_bug.cgi?id=14183
>
> Fantastic, thanks! Remember we plan to release on March 1. --

I am somewhat confused. I know these changes have been done. The 
function has been renamed to chunkBy and the return type of the 
unary version has been changed. I am surprised to learn, however, 
that the old version is included in the 2.067.0 release:

http://dlang.org/phobos/std_algorithm_iteration.html#.groupBy

What has happened?