Remove the final vestiges of stat.h from Apache 2.0. All calls are now to

ap_stat.  This also adds the new function ap_lstat().  This function is
analogous to lstat.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85535 13f79535-47bb-0310-9956-ffa450edef68