TF2 update 6/8/9

Team Fortress 2

* Added a "Discard" button to the item pickup panel.
* Added a backstab custom death animation to the Heavy.
* Changed default for tf_arena_use_queue to 1. This was the original behavior prior to the last update.
* Changed the Dead Ringer so it can be activated while carrying the flag.
* Increased the Force-A-Nature's damage by 10%.
* Fixed not being able to reflect arrows with the Flamethrower.
* Fixed The Huntsman drawing a muzzle flash under lagged conditions.
* Fixed the background color of the Spy disguise panel not always matching his disguise team.
* Fixed idle players being kicked when the server has tf_arena_use_queue set to 0.
* Fixed Spies not being able to sap a building if an enemy player was colliding with the building.
* Fixed getting a real target ID on an enemy Spy that's disguised as one of your teammates if you are disguised as an enemy.
* Fixed the Ambassador not shooting enemy sticky bombs.
* Fixed Spies being able to automatically cloak after uncloaking at the moment of a weapon switch.
* Fixed Jarate instantly exploding when thrown in some places, like the final area of Badwater.
* Fixed spectators not having their items removed when they enter spectator mode.
* Fixed Sniper "civilian" exploit where players could crash the server.
* Fixed a couple of cases where viable backstabs would fail.