Coerce arguments to functions, in some cases

[skx]

This is a bit of a sneaky change, but it is useful to convert arguments to lists in some cases:

• If a function is defined that accepts a single parameter.
• BUT multiple arguments are actually passed to that function
• THEN
  • If the parameter is not variadic
  • And the parameter is untyped, or typed as a list
  • REPLACE THE Arguments with a list containing their entries.

This means:

(set! and (fn* (xs:list) ... )

Can then be called:

(and true false true true ..)

Because the arguments will be rewritten as if they were called:

(and (list true false true true ..)

This is general purpose, and applies to all functions.

I think it's a good idea, but we'll see.