Configuration File Path

### Is your feature request related to a problem? Please describe.

I would like one of the configuration files options to be located in the current directory when running under Linux. This ability is only supported on Windows, `can.ini`, as best I can tell

### Describe the solution you'd like

Either add an entry(ies) to the default path list, or perhaps re-define one of the existing three $HOME configuration files to be in the current working directory.

### Describe alternatives you've considered

For now, I just copy the can.conf from the project directory to $HOME.

### Additional context
N/A