---< Begin of log >---
Oct 07 18:17:21.000 [notice] Your Tor server's identity key fingerprint is 'JollyRoger xxx'
Oct 07 18:17:21.000 [notice] Bootstrapped 0%: Starting
Oct 07 18:17:39.000 [notice] We now have enough directory information to build circuits.
Oct 07 18:17:39.000 [notice] Bootstrapped 80%: Connecting to the Tor network
Oct 07 18:17:41.000 [notice] Tor has successfully opened a circuit. Looks like client functionality is working.
Oct 07 18:17:41.000 [notice] Bootstrapped 100%: Done
Oct 07 18:17:41.000 [notice] Now checking whether ORPort xx.xxx.xxx.xxx:xxxx and DirPort xx.xxx.xxx.xxx:xxxx are reachable... (this may take up to 20 minutes
-- look for log messages indicating success)
Oct 07 18:17:43.000 [notice] Self-testing indicates your DirPort is reachable from the outside. Excellent.
Oct 07 18:17:43.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Publishing server descriptor.
Oct 07 18:17:44.000 [notice] Performing bandwidth self-test...done.
---< End of log >---
It looks like my TOR relay is now up and running on my Raspberry PI !!!