[CentOS] libxml2 update/packaging issues?

Hi,

> Hello all,
>
> last Friday (Oct 15) I encountered a weird issue relating to the
> libxml2* packages.
>
> I have a script which monitors the CentOS mirrors to find new packages.
> On Friday, these showed up:
>
> libxml2-2.9.1-6.el7.5.i686.rpm
> libxml2-2.9.1-6.el7.5.x86_64.rpm
> libxml2-devel-2.9.1-6.el7.5.i686.rpm
> libxml2-devel-2.9.1-6.el7.5.x86_64.rpm
> libxml2-python-2.9.1-6.el7.5.x86_64.rpm
> libxml2-static-2.9.1-6.el7.5.i686.rpm
> libxml2-static-2.9.1-6.el7.5.x86_64.rpm
>
> However, looking at Scientific Linux
> (https://scientificlinux.org/category/sl-errata/slsa-20213810-1/)
> and Red Hat Errata (https://access.redhat.com/errata/RHSA-2021:3810) it
> seems that CentOS is one release
> behind (el7.5 from CentOS vs. el7.6 for SL and RHEL).
>

Yes, it seems the newest package has not been built from current GIT.

What's also strange is that I see libxml2 two times, in
centos/7.9.2009/updates/x86_64/Packages/ and in
centos/7.9.2009/os/x86_64/Packages/. Both with identical version but
_different_ builds.

Maybe some automated thing which went wrong?

Regards,
Simon