tags: automatically fix incorrect tag counts during maintenance.

* Automatically fix all tags with incorrect counts during daily
  maintenance (previously only tags with negative counts were fixed).
* Log fixed tags to NewRelic.
* Remove the ability to manually fix tag counts with the "Fix" button on
  the /tags listing. This is no longer necessary now that tags are
  fixed automatically.

app/logical/danbooru_maintenance.rb

@@ -15,7 +15,7 @@ module DanbooruMaintenance
     ForumSubscription.process_all!
     TagAlias.update_cached_post_counts_for_all
     PostDisapproval.dmail_messages!
-    Tag.clean_up_negative_post_counts!
+    regenerate_post_counts!
     SuperVoter.init!
     TokenBucket.prune!
     TagChangeRequestPruner.warn_all
@@ -38,6 +38,13 @@ module DanbooruMaintenance
     rescue_exception(exception)
   end
 
+  def regenerate_post_counts!
+    updated_tags = Tag.regenerate_post_counts!
+    updated_tags.each do |tag|
+      DanbooruLogger.info("Updated tag count", tag.attributes)
+    end
+  end
+
   def rescue_exception(exception)
     DanbooruLogger.log(exception)
     raise exception