in bash 4.3.39, if I type a command, (like "."(source)) and a relative path like : ../conf<complete>, it expands the relative pathname to absolute pathnames.
This is bad .. since I reuse relative commands in different absolute places. It didn't used to do this, and it's a potential security problem, since if you reuse a command to configure something from before, and don't catch that it's not using the relative path, it could run the wrong command...
