This patch changes the apr_table_elts macro so that it provides

access to the internals of an apr_table_t via a const pointer
instead of the current non-const pointer.


Submitted by:	Brian Pane <BPane@pacbell.net>
Reviewed by:	Ian Holsman


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91860 13f79535-47bb-0310-9956-ffa450edef68