Clojurians Log v2

@danielcompton: there are probably gaps in the 404s in the logs - I added log_not_found off; the the nginx config for /repo at some point, since we didn't have the disk space for large logs

I re-enabled it a few days ago

but not in the ansible config. fixing that

hmm. I meant to re-enable it, but didn't

ah, right. log_not_found just prevents an error log entry for missing files, it doesn't prevent logging 404s. ignore me, and carry on!