Log Message:
repmgr: updated to 5.3.1

repmgr 5.3.1 is a minor release.

A.1.1. Bug fixes

Fix upgrade path from repmgr 4.2 and 4.3 to repmgr 5.3.

repmgrd: ensure potentially open connections are closed.

In some cases, when recovering from degraded state in local node monitoring, new \ 
connection was opened to the local node without closing the old one, which will \ 
result in memory leakage.