I'm in the process of migrating to SP 2013. In my current production site I've incoming requests 'posting data' to a layouts page ex: _layouts/mycustompage.aspx. I see that in SP 2013 the _layouts directory is moved to _layouts/15 causing all incoming post requests not to work.
Is there a solution to support post-requests during redirect? or at least support both the urls at the same time?