Import comment redirects from Drupal

This creates redirects for every single blog post comments, which is
quite a lot but allows us to maintain the Drupal comment permalinks
under /comment/<comment-id>
2 jobs for main in 2 minutes and 6 seconds (queued for 8 seconds)
Status Name Job ID Coverage
  Test
passed pages #29276

00:02:06

 
  Deploy
passed pages:deploy

00:00:03