Function set_evaporate_action:
Defined in module fluid (file: /std/fluid.c)

set_evaporate_action( mixed x )
'x' is optional.
Calling this function with no arguments
will cause the fluid to evaporate when 
outside of a container.  
x can be a string that is output to the
environment as the fluid evaporate_puddle
function is called.
x as a function will be evaluated when
the fluid is moved outside of a container.
Do not call this function if the fluid
is not to evaporate.

Prototype:
varargs void set_evaporate_action( mixed x );
