[#2833] Update HTML Help Workshop info

diff --git a/doc/devel/Doxyfile b/doc/devel/Doxyfile
index d9858a60e45a71471eff3289849eacb85d2bd6da..0e7fda0880435612c2270160e5dff17b45025e44 100644 (file)
--- a/doc/devel/Doxyfile
+++ b/doc/devel/Doxyfile
@@ -1377,8 +1377,11 @@ DOCSET_PUBLISHER_NAME  = Publisher
 # If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
 # additional HTML index files: index.hhp, index.hhc, and index.hhk. The
 # index.hhp is a project file that can be read by Microsoft's HTML Help Workshop
-# (see:
-# https://learn.microsoft.com/en-us/previous-versions/windows/desktop/htmlhelp/about-html-help-workshop) on Windows.
+# on Windows.
+# At the beginning of 2021 Microsoft took the original page, with all of the download links,
+# offline (the HTML Help Workshop had already been in maintenance mode for many years).
+# You can download the HTML help workshop from the web archives at
+# https://web.archive.org/web/20160201063255/http://download.microsoft.com/download/0/A/9/0A939EF6-E31C-430F-A3DF-DFAE7960D564/htmlhelp.exe
 #
 # The HTML Help Workshop contains a compiler that can convert all HTML output
 # generated by doxygen into a single compiled HTML file (.chm). Compiled HTML