Updated code used to get IP address.
Duplicate account check v1.9 changes: Fixed issue dealing with intermittent duplicate entry error.
Duplicate account check v1.8 changes: Corrected issue with Exclude usernames in the Options page.
Duplicate account check v1.7 changes: Fixed issue where deleted accounts would still show as duplicate.
Duplicate account check v1.6 changes: Now using finder for performing database queries.
Duplicate account check v1.5 changes: Updated setup to use schema manager.
