pool variable for which 
              the caller wants to retrieve a full (potentially 
              continued) string.
 
   nth        is the number of the string to retrieve from the kernel
              pool.  The range of `nth' is 0 to one less than the
              number of full strings that are present.
             
   contin     is a sequence of characters which (if they appear as the
              last non-blank sequence of characters in a component of a
              value of a kernel pool var