- Added scoreboard toggling.
Merge branch 'master' of https://github.com/ChillyDoom/zdoom into scoreboardtoggle
- Added JLOSF_CHECKTRACER for A_JumpIfTargetInLOS.

- CHECKTRACER doesn't need to be a missile or have the SEEKERMISSILE
flag.
- fixed: EV_Teleport must not access the thing's player pointer before ensuring that 'thing' is a valid pointer.
DoKill bug

-Fixed: DoKill did not target 'killtarget' for missiles, causing crashes and making the function not work properly.
- Added SXF_ORIGINATOR.

- Only useful for missiles.

By default, missiles cannot set themselves as the master when spawning
actors.
Merge branch 'scoreboardtoggle' of https://github.com/ChillyDoom/zdoom
Merge branch 'experimental' of https://github.com/MajorCooke/zdoom
Merge branch 'master' of https://github.com/MajorCooke/zdoom

Conflicts:
	wadsrc/static/actors/constants.txt