Add a (hidden) feature for filtering authors down to a set, not just one.
[pr0n] / sql /
drwxr-xr-x   ..
-rw-r--r-- 3025 pr0n.sql
-rw-r--r-- 2931 upgrade-v2.40.sql
-rw-r--r-- 2464 upgrade-v2.50.sql
-rw-r--r-- 362 upgrade-v2.71.sql
-rw-r--r-- 674 upgrade-v3.11.sql