Fix doxygen comments.

In trunk: r1611210 , r1611252, r1611481, r1611919

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1611925 13f79535-47bb-0310-9956-ffa450edef68
Propose

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1611928 13f79535-47bb-0310-9956-ffa450edef68
XML Updates.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1611931 13f79535-47bb-0310-9956-ffa450edef68
Rebuild.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1611933 13f79535-47bb-0310-9956-ffa450edef68