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ToggleCrouch

Adds the console command "toggle_crouch"
To bind to left control, for example, run "bind ctrl toggle_crouch" in the console.

If you need to switch back to the normal crouch mode (like if a server has mods disabled) then enter "bind ctrl +duck" in the console

See https://developer.valvesoftware.com/wiki/Bind for more information about binding keys.

Let me know in the comments if you have any other questions or suggestions!