The issue with Emacs "cd" function and CDPATH

Recently I wasted sometime trying to figure out an issue with "cd" function and autocompletion in Emacs, while I had a value set for CDPATH environment variable. I hope it saves some time for someone who might bump into the same issue.

I had CDPATH environment variable set and it didn't have "." (current directory) as one of the components. When I tried autocompletion while running "cd" function, it didn't show any of the subdirectories under the current directory. The directories it showed for completion were from somewhere else. As soon as I added ".", I was able to see all the subdirectories of current directory in the autocompletion list.

Hope this saves some time for you as well.

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