On the 1.8.x-r1573744-and-friends branch:
Manually backport
- recover & hotcopy test cases of r1547489, r1560643 and r1573744
- recover & hotcopy implementation fixes of r1561419 and r1561427.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x-r1573744-and-friends@1640603 13f79535-47bb-0310-9956-ffa450edef68