Allow mod_dav to do weak entity comparison function rather than a strong
entity comparison function. (i.e. it will optionally strip the W/ prefix.)
That doesn't really follow the spirit of etag validation in HTTP. In theory, the client is not allowed to use weak etags for anything other than cache consistency checks, so this won't help any client that is actually HTTP-compliant. It would be better to send a strong entity tag in the first place.
....Roy
