maintenance: stretch→buster upgrade of security upload host (suchon.d.o)

[Julien Cristau <jcristau@debian.org>]

Hi,

I'm about to upgrade the security upload host (suchon.d.o) from stretch
to buster.  That is going to cause (most likely short) outages during the
next hour or so.  I'll follow up when done.

Cheers,
Julien