1.0.4.56: Make case-insensitive string and character comparisons non-consing

1.0.4.56: Make case-insensitive string and character comparisons non-consing

	* Create two-arg versions of case-insensitive character comparison
	  functions;
	* Use said functions in the general case;
	* Make source transforms for the general functions use the two-arg
	  functions, thereby avoiding the &REST consing of the general
	  functions.