New surfaceParm "flagblock"

[Silverfang22]

Similar to "playerblock", restricts players holding an objective (more than just flags?) from entering.

May be useful for restricting players from leaving an objective area with a held objective in the future.

Possible alternative: Make players who enter the brush drop the flag instead of being blocked? This way if they are knocked back by an enemy through the brush, it makes more sense than hitting an invisible wall. In this case it probably needs to block an unheld flag so it can't fly outside its 'bound area'.

[Futuza]

Might also be useful to have a lua bounding box/sphere that can do the same thing so that we can dynamically place these with scripting if we wanted to. It wouldn't be as customizable as a surfaceParm brush that is created in Radiant, but would probably still be useful.