comment_notify 5.x-2.3

There was one critical bug (#374210: whenever a "reply to this comment" reply is reached that doesn't get sent, all sending breaks) that is worth this release.

Changes since DRUPAL-5--2-2:

• bug from justintoupin: ending label with . doubles up with .: - stop it
• bug #323399 by PremAnup: Variables !commname, !commtext, !commsubj don't work for sending to a subscribed author
• bug #322089 by greggles suggestion by Dries: Small UI inconsistencies
• a bit of leftover from 322089
• bug #336394 by ulhume: postgresql compliance for unsubscribe links.
• task #326310 by aclight: TODO cleanup variables -> comment_notify.install
• task #322482 by greggles: UI Simplification: Remove the admin option to remove the checkboxes from the form
• #317640 by greggles, aclight: Remove notify column from comments table
• #368638 by starkos: remove extra period from label
• task #348000 by aclight: stop using the ->data to store preferences
• bug #374210 by greggles: whenever a 'reply to this comment' reply is reached that doesn't get sent, all sending breaks
• bug #439308 by greggles: fix a warning due to looping an occasionally empty array