Merge r1710380, r1710391 from trunk:

Make the fix for fully qualifying REDIRECT_URL from PR#57785 opt-in. 




followup to r1710380 -- refactored name and didn't have 'make depend'


Submitted by: covener
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1712268 13f79535-47bb-0310-9956-ffa450edef68