Fix problem where bans / unbans, etc get out of sync between multiple servers.  The fix is to make sure that task DB queries don't have any 'gaps' in the timestamps they search for.
Merge branch 'master' of https://github.com/confuser/Ban-Management
Merge pull request #16 from ptoal/master

Fix for Cache Synchronization problem (Bans / Unbans not taking effect on multiple servers)