make to work on sun, added copyright, etc

lang/m2/comp/class.h

@@ -1,5 +1,14 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ *
+ * Author: Ceriel J.H. Jacobs
+ */
+
 /* U S E   O F   C H A R A C T E R   C L A S S E S */
 
+/* $Header$ */
+
 /*	As a starter, chars are divided into classes, according to which
 	token they can be the start of.
 	At present such a class number is supposed to fit in 4 bits.