clean up some warnings dealing with

1) mismatches between printf format strings and arguments
2) wrong type for last parm to ap[r]_xml_to_text
3) missing time.h decls


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88603 13f79535-47bb-0310-9956-ffa450edef68