set Tor Control Authcookie default file location from /var/lib/tor/control.authcookie to /var/run/tor/control.authcookie
For an ephermal file, the default location is much more appropriate in /var/run/tor/control.authcookie rather than the current default /var/lib/tor/control.authcookie.
To help standardize the path, please change Tor's default to /var/run/tor/control.authcookie, which is also what Debian is using.
This would help define a more standard way across distributions how Tor control port authentication should work. https://github.com/rustybird/corridor/issues/11
return get_datadir_fname("control_auth_cookie");