SYSTEM VARIABLES
- New system variables for the service Internet were added.
- $INT_PRICE_WITH_VAT_INV_PERIOD$: The price for an invoice period with VAT
 - $INT_PRICE_WITHOUT_VAT_INV_PERIOD$: The price for an invoice period without VAT
 
 
- New system variables for the service IPTV:
- $IPTV_CONTRACT_LIFETIME$: Minimal duration of a contract
 
 
