*) Compensate for recent changes in the APR headers. Specifically, some

   files need to specifically include stdio.h, or a particular apr_*.h
   header.

*) Adjust callers of apr_create_process() to deal with the extra "const"

*) Add "const" to args of ap_os_create_privileged_process()


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87080 13f79535-47bb-0310-9956-ffa450edef68