0.8alpha.0.28:

0.8alpha.0.28:
	Fix bug 47d (DEFGENERIC must signal PROGRAM-ERROR when
	attempting to create a generic function with the same name as a
	special operator).
	... sounds easy, huh?  No.
	... make COMPILER-ERROR not inherit from ERROR any more, so that
		user handlers don't (wrongly) claim to handle it;
	... establish a handler for COMPILER-ERROR around the evaluator
		that delegates to the compiler handlers if present, but
		handles them itself if not...
	... by signalling an error from a new internal restart, to allow
		user handlers for ERROR and friends a chance to run.