improved license text for the free port deed

improved license text for the free port deed

- Potential fix for couple of NPC provider issues with mission screens
- Only the player accepting the contract is now starting the mission (players within 50m radius are no longer collected), other players can be added by the invite command

- GPS cleanup altered to properly clean Unknown Signals with new names

- Unknown Signals have unique name to prevent cross-deletion when multiple players play at the same location
- Unknown Signals note the lifetime in their description

NPC Provider despawn cycle was ignoring that some grids are active NPC's in missions, I told him not to despawn those >_>