Add info on Data General.

INSTALL

@@ -37,6 +37,14 @@ SPARC:
 	Sun SPARCstation 10 running Solaris 2.3 using gcc and cc (about 1.4A2)
 	Sun SPARCstation 10 running Solaris 2.4 using gcc (about 1.4A2)
 	NextSTEP 3.3 (1.4.92, a few tweaks needed)
+Data General:
+        dgux 5.4R2.10 generic AViiON mc88100
+        According to the rcs man page, the rcs version is:
+                Author: Walter F. Tichy.
+                Revision Number: 5.1.1.1; Release Date: 1992/02/10.
+                Copyright 1982, 1988, 1989 by Walter F. Tichy.
+                Copyright 1990, 1991 by Paul Eggert.
+        Can't find any info on diff, but we're using the standard /bin/diff.
 
 (footnote 1)
 	AIX 4.1 systems fail to run "configure" due to bugs in their