processed John Dalbec's fix of 2000/dlowe

Updated `bugs.html` to reflect the fix of all known bugs in `2000/dlowe`.

Added thank you to John Dalbec in `thanks-for-help.md`.

Added processing of "%%REPO_TOP_URL%%" tokens to `bin/subst.default.sh`.

Updated `find-missing-links.sh` to not falsely report missing links
when a "%%REPO_TOP_URL%%" token is used.

Changed `bin/subst.default.sh` VERSION from "1.3.2 2024-08-05"
to "1.4.0 2025-04-16".

Changed `bin/find-missing-links.sh` VERSION from "1.1.1 2024-04-28"
to "1.2.0 2025-04-16".

Due to a `pandoc(1)` bug fix, `2011/fredriksson/index.html` and
`2012/kang/index.html` were modified.  The bug fix removed extraneous
whitespace that was previously introduced into HTML under certain
situations.  These 2 changes do **NOT** impact the way web browsers
render these pages, however.

Updated sitemap.

Tested the above via `make www gen_status gen_sitemap timestamp` on macOS.

2000/dlowe/README.md

@@ -17,7 +17,6 @@ The following bit of perl may help determine the values you need:
 
 The current status of this entry is:
 
-> **STATUS: known bug - please help us fix**<br>
 > **STATUS: INABIAF - please DO NOT fix**
 
 For more detailed information see [2000/dlowe in bugs.html](../../bugs.html#2000_dlowe).

2000/dlowe/index.html

@@ -452,8 +452,7 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
 <p>The current status of this entry is:</p>
 <blockquote>
-<p><strong>STATUS: known bug - please help us fix</strong><br>
-<strong>STATUS: INABIAF - please DO NOT fix</strong></p>
+<p><strong>STATUS: INABIAF - please DO NOT fix</strong></p>
 </blockquote>
 <p>For more detailed information see <a href="../../bugs.html#2000_dlowe">2000/dlowe in bugs.html</a>.</p>
 <h2 id="to-use">To use:</h2>