ability to insert mission specific code via config

[McDiod]

https://github.com/gruppe-adler/grad-replay/blob/master/functions/server/fn_startRecord.sqf#L26

Just an example, but the allMissionObjects command takes forever, so it shouldn't be hardcoded into the module when not every mission needs it.

Easiest way to solve this would be a config entry like

trackedMissionObjects = "allMissionObjects 'Land_DataTerminal_01_F'";
missionSaveModifier = "if (_type == 'Land_DataTerminal_01_F') then {color = [1,0,0,1]}";