Left 4 Dead 2 "Last Stand" Update

The Last Stand Community Update has been released! Visit https://www.l4d.com/laststand/ for all of the details.

Summary of the more than 1000 changes across the entire game:

- Fixed an exploit that could lag or crash a server by spawning infinite pistols. - Rate-limit commands to prevent client command DOS attacks against servers. - Fixed the ability to bypass the damage filter on the gas station's rolling door by going idle. - Fixed avoiding damage from the charger by toggling in/out of idle while being body slammed. - Fixed clearing the boomer screenspace effect by taking a break. - Fix griefing exploit where a survivor would fire the grenade launcher and then switch to spectator to skip the friendly-fire check - Record the team of a vote caller at the time the vote is called, so if the caller disconnects the other players can still have their votes checked against the caller's team. Fixes team-based votes locking out new voters if the caller disconnects. - Build a map load command on the server instead of directly executing the command that's received as part of the server reservation packet. Fixed potential server takeover exploit. - Fixed SI ghosts playing jump landing sounds - Prevent players from joining the survivor team as a character already occupied by a human player. - Marked "voice_all_icons" (used for testing) as a cheat command. Clear the voice state whenever the value changes so voice bubbles don't stay visible when switching between cheat enabled/disabled games. - Marked cl_survivor_light_* cvars as cheats. - Made survivor_teammatefocus_* convars replicated, so they can still be used as a legitimate way to play but are forced to be consistent for all clients. - Removed a three-second window where an infected player could force a faster transition from the observer state to the ghost state by pressing a key. - Don't spam open/close door client commands while the door is in the process of opening or closing.

- Fixed spawn areas permanently excluded from spawn set when a survivor dies, idles, or changes character. - Fixed mobs unable to spawn if survivors stand in specific areas during a finale. - Always restore the default pain pills decay rate when the director resets. - Fixed the L4D1 survivor gestures not playing on dedicated servers. - Allow SI to destroy breakables in finale areas during survival and scavenge modes once the round begins. - Fixed breakables sometimes failing to unblock the nav when they break. - Don't stumble the charger if the charge attack starts while already in contact with the victim. - Fixed L4D1 survivors not selecting their canonical preferred weapons when scavenging. - Allow survivors to pick up ammo while fighting a tank or in close combat if they are less than 40% full. - Bots will use pills only if health < 50 - Bots consider health to be critical at < 30 (was 40). This means real health must be < 5 before a bot will use first-aid over a full temp health buffer. - Fixed a few cases where specials may choose to wait in an ambush position when the game mode says they should be assaulting the survivors - If a chase path that's trying to lead the target fails, fall back to a non-leading path. Leading paths that run off a cliff aren't always handled properly and can cause the target to be treated as unreachable. - Revised the logic for fitting both tank and witch spawn locations into the flow. Previously they would frequently collide and the witch would get culled; now they should always find