This removes an invalid warning message for an incorrectly entered pin, but more...

This removes an invalid warning message for an incorrectly entered pin, but more importantly removes an inapplicable check. If the first argument passed to app_authenticate does not contain a '/', the argument should be treated as the sole fixed "password" to match against and that is all. (Previous behavior was attempting to open a file based on the pin.)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@114327 65c4cc65-6c06-0410-ace0-fbb531ad65f3