Expand factoid variables in /call statements
Expand factoid variables in /call statements

This allows us to call random factoids.

E.g.:

  factadd global fact1 is /say This is fact1.
  factadd global fact2 is /say Fact2 is also a pretty neat fact.
  factadd global fact3 is /say But don't forget about fact3!
  factadd global facts is fact1 fact2 fact3
  factadd global randomfact is /call $facts

Invoking the `randomfact` factoid will now randomy pick between
fact1, fact2 and fact3.

This was added to support the `randomkr` factoid.

pragma-/pbot,pragma-/pbot,pragma-/pbot,pragma-/pbot