This brings apache back in line with apr following the addition

of apr_file_dup2.

Until Win32 and OS/2 have the function added this will break their
builds, but Will Rowe has said he'll do it this morning and asked for
the patch to apr to go in :)  Go Will!


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92824 13f79535-47bb-0310-9956-ffa450edef68