tor logging twice when --+Log argument and config are used

When specifying the Log option to the same place twice various messages will be logged twice.

Specifying

# On the command line:
--+Log notice file /var/log/tor

# In torrc:
Log notice file /var/log/tor

will result in messages like those:

Feb 05 11:05:41.000 [notice] Bootstrapped 0%: Starting
Feb 05 11:05:41.000 [notice] Bootstrapped 0%: Starting
Feb 05 11:05:54.000 [notice] Bootstrapped 80%: Connecting to the Tor network
Feb 05 11:05:54.000 [notice] Bootstrapped 80%: Connecting to the Tor network
Feb 05 11:05:54.000 [notice] Bootstrapped 85%: Finishing handshake with first hop
Feb 05 11:05:54.000 [notice] Bootstrapped 85%: Finishing handshake with first hop
Feb 05 11:05:54.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent.
Feb 05 11:05:54.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent.

In a way one could say that's expected, but I think equivalent options should maybe be deduplicated.

This occurs on: Tor v0.2.8.1-alpha (git-9093e376) running on FreeBSD with Libevent 2.0.22-stable, OpenSSL 1.0.2f and Zlib 1.2.8.

Trac:
Username: reezer