Re-instantiate 1.8.x backport branch 1.8.x-r1619380.
It got wrongly removed in r1645563.

* 1.8.x-r1619380: Resurrect.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x-r1619380@1645571 13f79535-47bb-0310-9956-ffa450edef68