Added "update-url" command to find/replace url in the database

- Also aligned format of command descriptions.

Targeted most common columns.
Have not done revisions for the sake of keeping that
content true to how it was originally stored but could
cause unexpected behaviour.

For #1225

app/Console/Commands/ClearViews.php

@@ -18,7 +18,7 @@ class ClearViews extends Command
      *
      * @var string
      */
-    protected $description = 'Clear all view-counts for all entities.';
+    protected $description = 'Clear all view-counts for all entities';
 
     /**
      * Create a new command instance.