Use cached version of global time so the database doesn't get overthrown
with a lot of request. The global time will get updated every 5 minutes
any way. (The GlobalTime requirement could potentionally DDOS the
database server with all the requests)

Signed-off-by: Staartvin <mijnleraar@msn.com>
Clarification.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Add new GlobalTime requirement. This allows admins to test how much time
they played on all their servers (or network).

Signed-off-by: Staartvin <mijnleraar@msn.com>