qubes-release: introduce security-testing repo definition

qubes-release/qubes-dom0.repo.in

@@ -14,6 +14,14 @@ metadata_expire = 7d
 gpgcheck = 1
 gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-$releasever-primary
 
+[qubes-dom0-security-testing]
+name = Qubes Dom0 Repository (updates-testing)
+baseurl = http://yum.qubes-os.org/r$releasever/security-testing/dom0/%DIST%
+enabled = 0
+metadata_expire = 7d
+gpgcheck = 1
+gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-$releasever-primary
+
 [qubes-dom0-unstable]
 name = Qubes Dom0 Repository (unstable)
 baseurl = http://yum.qubes-os.org/r$releasever/unstable/dom0/%DIST%