>>>>> Daniel Semyonov writes:

    > I just realized this patch still can't be merged though, NEWS and
    > the manual need updated.  I'll do it on my phone tomorrow if I
    > have the time.  Hopefully this can be merged soon finally though

I've added a section to the manual documenting nnfeed (without going too
far into implementation details, which are available in the comments and
docstrings of "nnfeed.el"), and amended the the section documenting nnatom.
I've also documented nnfeed in NEWS.

I think this can be merged now.  Updated patch attached.

Thanks,
Daniel