Updates to Team Fortress 2 have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:

Engine

• If the installation is an HLTV relay we allow clients to connect as HLTV clients even if tv_enable is set to false. A recent exploit fix made it such that we ignore the flag indicating that the client is an HLTV client if tv_enable is false, but it is possible that relays won't have this ConVar set

Additions / Changes

• Backpack improvement
  
  • Added support for 100 slots in the backpack
  • Backpack can now be sorted by type
  • Multi-selection in the backpack is now done by holding down the Ctrl key
• Alt-fire on the Sandvich now drops sandviches
  
  • A single sandvich can be dropped at a time. Dropping the sandvich removes it from the Heavy
  • A Heavy can regain his sandvich by collecting a healthkit while already being at full health
  • Eating a sandvich using the taunt method now heals a Heavy to full health
  • Dropped sandviches heal 50% of the collector's health
• Medic regen changes
  
  • Base regen amount increased from 1/sec to 3/sec
  • Regen amount increase since time of last damage decreased from 3x to 2x
  • End result of above: Old healing scaled from 1/sec to 3/sec based on time since being damaged (maxed out at 10 seconds). New healing scales from 3/sec to 6/sec
• Blutsauger
  
  • Replaced "No critical hits" negative attribute with "-2 health drained per second on wearer"
  • Health drain stacks on top of the above Medic regen changes, lowering the base regen by 2h/sec
• Added "mp_windifference" server ConVar (default to 0)
  
  • When set to X, matches will be considered won if a team gets X points ahead of the other team
• Added a "Remember the active weapon between lives" option to the Multiplayer->Advanced options dialog
• Added "Disable weather effects" option to the Multiplayer->Advanced options dialog
• Added "Show non-standard items on spectated player" option to the Multiplayer->Advanced options dialog
  
  • If set (default), it'll show non-standard items being carried by the player you're spectating
• Tournament mode changes
  
  • New item whitelist allowing tournaments to control what items can be used by players
  • Added "item_whitelist_example.txt"
  • Added "item_show_whitelistable_definitions" command to get a list of whitelistable items
• Added Tournament mode Spectator HUD
  
  • Added "Use advanced spectator HUD in tournament mode" option to the Multiplayer->Advanced options dialog
  • Shows all the members of your team (or both if you're a spectator) at the top of the screen, along with class/health/respawn time/charge level
  • Spectator indices are now shown on the team members, and hitting the corresponding weapon selection key (slot1-slot12 commands) will spectate them
• Changed idle player check to include spectators & players who haven't chosen a team