Merge r1533065, r1491724, r1425360, r1496194 from trunk:

Eclipse code analysis warning

Reduce stack usage by 3k

style fixes, add comment

no code change


attribute and error reason reversed

Submitted by: jim, jailletc36, sf, covener
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1542329 13f79535-47bb-0310-9956-ffa450edef68