Release (probably next week)

• cvmfs-2.13.1: fixes a bug that has been present since cvmfs-2.12.0 which prevents periodic resets to the closest stratum 1, causing performance degradation. All who have upgraded to version 2.12.0 or later are encouraged to update as soon as possible.
• Previously mentioned Frontier Squid 6.13 delayed and moved into osg-upcoming due to required manual changes
• XRootD 5.8.3-1.3: same as 5.8.3-1.2 except with https://github.com/xrootd/xrootd/pull/2472