Doxygen: fix broken links

Doxyfile

@@ -1152,12 +1152,12 @@ HTML_INDEX_NUM_ENTRIES = 100
 
 # If the GENERATE_DOCSET tag is set to YES, additional index files will be
 # generated that can be used as input for Apple's Xcode 3 integrated development
-# environment (see: https://developer.apple.com/tools/xcode/), introduced with
+# environment (see: https://developer.apple.com/xcode/), introduced with
 # OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a
 # Makefile in the HTML output directory. Running make will produce the docset in
 # that directory and running make install will install the docset in
 # ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at
-# startup. See https://developer.apple.com/tools/creatingdocsetswithdoxygen.html
+# startup. See https://developer.apple.com/xcode/resources/
 # for more information.
 # The default value is: NO.
 # This tag requires that the tag GENERATE_HTML is set to YES.
@@ -1197,7 +1197,7 @@ 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://www.microsoft.com/en-us/download/details.aspx?id=21138) on
+# (see: https://learn.microsoft.com/en-us/previous-versions/windows/desktop/htmlhelp/microsoft-html-help-downloads) on
 # Windows.
 #
 # The HTML Help Workshop contains a compiler that can convert all HTML output
@@ -1423,7 +1423,7 @@ USE_MATHJAX            = NO
 
 # When MathJax is enabled you can set the default output format to be used for
 # the MathJax output. See the MathJax site (see:
-# https://docs.mathjax.org/en/latest/output.html) for more details.
+# https://docs.mathjax.org/en/latest/web/components/output.html) for more details.
 # Possible values are: HTML-CSS (which is slower, but has the best
 # compatibility), NativeMML (i.e. MathML) and SVG.
 # The default value is: HTML-CSS.
@@ -1453,7 +1453,7 @@ MATHJAX_EXTENSIONS     =
 
 # The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces
 # of code that will be used on startup of the MathJax code. See the MathJax site
-# (see: https://docs.mathjax.org/en/latest/output.html) for more details. For an
+# (see: https://docs.mathjax.org/en/latest/web/components/output.html) for more details. For an
 # example see the documentation.
 # This tag requires that the tag USE_MATHJAX is set to YES.
 

cmake/Doxyfile.in

@@ -981,7 +981,7 @@ HTML_INDEX_NUM_ENTRIES = 100
 # directory and running "make install" will install the docset in 
 # ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find 
 # it at startup. 
-# See https://developer.apple.com/tools/creatingdocsetswithdoxygen.html 
+# See https://developer.apple.com/xcode/resources/
 # for more information.
 
 GENERATE_DOCSET        = NO

external/db_drivers/liblmdb/Doxyfile

@@ -863,7 +863,7 @@ HTML_DYNAMIC_SECTIONS  = NO
 # directory and running "make install" will install the docset in
 # ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find
 # it at startup.
-# See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html
+# See https://developer.apple.com/xcode/resources/
 # for more information.
 
 GENERATE_DOCSET        = NO