checkpoint rules version 29.03 2025-11-19

Add an `#ruleX` anchor tag to each rule.

Fix `GNU Makefile syntax` in `Rule 15 Building`.

Remove redundant text in `Rule 17 Packaging` about
empty/blank files.

Ran `make quick_www` to perform the above.

sitemap.xml

@@ -16870,11 +16870,11 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/next/rules.html</loc>
-    <lastmod>2025-11-20T07:40:05+00:00</lastmod>
+    <lastmod>2025-11-20T21:45:59+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/next/rules.md</loc>
-    <lastmod>2025-11-20T07:40:02+00:00</lastmod>
+    <lastmod>2025-11-20T21:45:51+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/next/submit.html</loc>
@@ -16938,7 +16938,7 @@
 </url>
 <url>
     <loc>https://www.ioccc.org/status.html</loc>
-    <lastmod>2025-11-20T06:38:54+00:00</lastmod>
+    <lastmod>2025-11-20T21:47:23+00:00</lastmod>
 </url>
 <url>
     <loc>https://www.ioccc.org/status.json</loc>