%use masm: much better documentation

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
diff --git a/doc/changes.src b/doc/changes.src
index 3dc85de..714299d 100644
--- a/doc/changes.src
+++ b/doc/changes.src
@@ -27,6 +27,9 @@
 
 \b Fix macro label capture (\c{%00}, \k{percent00}).
 
+\b Much better documentation for the MASM compatiblity package,
+\c{%use masm} (see \k{pkg_masm}).
+
 \b Portability fixes.
 
 \S{cl-2.15.02} Version 2.15.02