The job queue will allow us to have better flood control and rate
limiting instead of trying to do all the database writes as soon as
parsoid contacts MediaWiki.
On the downside, this means it may take longer for changes to be
reflected in the database and to users, but we already have no promise
for that, so it seems okay.
Note that if you don't have a job queue runner set up, you'll need to
run the runJobs.php script every time to have the jobs execute.
Change-Id: I25fd54734aca4dab09711e7f6aee027654931300
linter_cat is now an int ID that points to a row in the new
lint_categories table.
The mapping between category names and ids is all handled in PHP, and
cached in APC.
Note that you will need to drop the `linter` table manually and re-run
update.php for this to take effect.
Change-Id: I369d9b4d8d08289b4a20d1cd29a2e327bad28ef8
