Re: src/backend/Makefile CDPATH Patch

> The above is due to the following:
>
>     $ export CDPATH=.:/home/jt:/home/jt/src:/home/jt/lib
>     $ echo `cd parser/ && pwd`
>     /home/jt/src/pgsql/src/backend/parser /home/jt/src/pgsql/src/backend/parser

Basically, you are telling me that if there are two matching parser
directories, pwd gets set to _both_ of them.  Sorry, I don't think we
want to work around a bug like that, so we?

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