Review spree.

* 1.8.x/STATUS:
  - vote for r1518184, r1524869
  - vote for & approve r1516806, r1519615 group, r1519955,
    r1520529 group, r1522892, r1523666

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1530490 13f79535-47bb-0310-9956-ffa450edef68