bogus pkg_summary for NetBSD 11/amd64

Every morning at 8AM Madrid time, https://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/x86_64/11.0/All/pkg_summary.gz
gets re-written with a wrong amount of packages, going from 27k+
packages to a very suspicious 9999.
The actual number of packages in the repository is correct:

$ curl -s -L https://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/x86_64/11.0/All/|grep -c '\.tgz<'
27462

And before 8AM pkg_summary count matches, but after:

$ curl -s -L https://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/x86_64/11.0/All/pkg_summary.gz|zgrep -c ^PKGNAME
9999

The count eventually recovers later in the day, though I haven't
tracked the exact time.

This of course is reflected on cdn.NetBSD.org and also makes pkgin
pretty much unusable on NetBSD 11/amd64.

------------------------------------------------------------------------
Emile `iMil' Heitor <imil@{home.imil.net,NetBSD.org}> | https://imil.net