Fix mission briefing descriptions

There is no central hive, so every server is private. It's silly to have
that in the description.

Server Files/MPMissions/DayZ_Epoch_23.cmr_ovaron/mission.sqm

@@ -32,8 +32,8 @@ class Mission
 	randomSeed=11171215;
 	class Intel
 	{
-		briefingName="DayZ Epoch Overon";
-		briefingDescription="Overon DayZ Epoch Private Server";
+		briefingName="DayZ Epoch Ovaron";
+		briefingDescription="DayZ Epoch Ovaron";
 		startWeather=0;
 		forecastWeather=0;
 		year=2008;