Propose a rational backport.

Overthinking our interaction with APR is a deep hole we don't want to go down.
For 2.next, of course we will throw away all this code, but this is a stopgap
with a future #define compatibility wrapper once we get that far.

Now, with extra history...




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1747479 13f79535-47bb-0310-9956-ffa450edef68