Whoops, IndexIgnore has the same issues on OS/2 case-aware
	filesystems as on Win32.  Add a new define so any other
	platforms can set it as needed.  This stuff in mod_autoindex
	is still not as good as having some OS-aware routine do filename
	pattern matching, but it at least fixes the problem for now.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81587 13f79535-47bb-0310-9956-ffa450edef68