Please review Gnus bug 20670

[Nikolaus Rath]

Hello,

Could someone take a look at the Gnus patch in
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=20670?

The patch has been sitting there for more than a year. It would be great
to either see it committed, or to have some feedback on the issues that
prevent that.

I've been using the patch locally ever since writing it and did not
encounter any problems.

Best,
-Nikolaus
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