Add fix for Filters Plugin dealing with duplicate rule processing and

false unread message counts.  This should close both bug # 676073
and patch # 919045 (the patch is not needed after this fix)
I do not have access to close these bugs, so if someone else will do the honor :)

ChangeLog

@@ -268,6 +268,8 @@ Version 1.5.1 -- CVS
   - Included local configuration file in config.php generated by
     administrator's plugin.
   - Updated the Filters plugin to comply with our Plugin Standards
+  - Fixed Filters plugin problems with duplicate rule processing and false
+    unread message counts (Bug# 676073 and patch #919045)
 
 Version 1.5.0
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