User agent v2.8 changes: Added check empty condition for superglobal variable.
User agent v2.7 changes: Fixed issue with intermittent deadlock.
User agent v2.6 changes: Added "Show user agent information" to options page.
User agent v2.5 changes: Fixed issue where a deleted user would still show in the User agent page.
User agent v2.4 changes: Fixed issue dealing with intermittent duplicate entry error message.
User agent v2.3 changes: Now using finder for performing database queries.
User agent v2.2 changes: Updated setup to use schema manager.
User agent v2.1 changes: Improved IP search function.
