Merge r1562472, r1561262, r1561923, r1574151 from trunk:

More debugging


More debug messaging... useful for tracking down
if we used attach or create

c89 fix


follow-up to r1562472, 1561262, and 1561923:

Improve messaging...

* easier to tell what went wrong in some cases
* reduce number of debug messages without losing information in some cases

Submitted by: jim, covener, trawick
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1574476 13f79535-47bb-0310-9956-ffa450edef68