Goal

• As a Fedora+CentOS Stream+RHEL packager, I want be able to use the %dist_purl_namespace RPM macro, so that I can construct purl on build time.

For context, see https://lists.fedoraproject.org/archives/list/packaging@lists.fedoraproject.org/thread/GTRCTAF3R3SSBVEJYFCATKNRT7RYVFQI/

For c10s, see my Merge Request https://gitlab.com/redhat/centos-stream/rpms/centos-stream-release/-/merge_requests/7

Acceptance criteria

• `rpm --eval '%dist_purl_namespace'`
• on RHEL: redhat
• on c10s: centos

Thanks.