more warnings added

Rev: .how_to_build_from_scratch:1.2

.how_to_build_from_scratch

@@ -29,3 +29,11 @@ Pike development environment you must ddo the following steps:
 
 7) 'make'
 	This builds pike.
+
+After doing this, DO NOT, commit the generated files. They are placed in
+.cvsignore files so you shouldn't have to bother with them.
+Doing 'make export' will create a tar file with all the needed files,
+but they should NOT be in the CVS archive!
+
+	/Fredrik Hubinette
+