[TYPO3-english] How to pass a parameter through a whole TYPO3 site in 4.5 respecting caching?

[Stephen Bungert]

You can use defaultGetVars to set params, anywhere that uses typolink will 
then add the vars to the links generated.

config {
  defaultGetVars {
    myvar   = myvalue
  }

  linkVars = myvar
}