Updated Doxygen link

content/swdev.html

@@ -2,7 +2,7 @@
 title: SW development in TPC
 layout: software
 author: Vesa Oikonen
-updated_at: 2020-04-14
+updated_at: 2021-09-16
 tags:
   - Software
   - C language
@@ -63,7 +63,7 @@ be downloaded from here:
   <a href="http://www.cmake.org">
   <img src="./pic/CMake-logo-253x83.png" alt="CMake logo" />
   </a>
-  <a href="http://www.stack.nl/~dimitri/doxygen/index.html">
+  <a href="https://www.doxygen.nl/">
   <img src="./pic/doxygen.png" alt="Doxygen logo" />
   </a>
   <br>

content/swdev_linux.html

@@ -3,7 +3,7 @@ title: SW development using C in Linux
 layout: software
 author: Vesa Oikonen
 created_at: 2014-03-10
-updated_at: 2020-04-14
+updated_at: 2021-09-16
 tags:
   - C language
   - Software
@@ -46,7 +46,7 @@ to build, test, and package the TPCCLIB software. Download and install CMake usi
 sudo apt-get install cmake
 </pre>
 
-<p>Install also <a href="http://www.stack.nl/~dimitri/doxygen/">Doxygen</a> and, 
+<p>Install also <a href="https://www.doxygen.nl/">Doxygen</a> and, 
 depending on Doxygen settings, <code>Graphviz (dot)</code>, 
 using <em>Synaptic package manager</em>.</p>
 

content/swdev_windows.html

@@ -2,7 +2,7 @@
 title: SW development using C in Windows
 layout: software
 author: Vesa Oikonen
-updated_at: 2019-09-10
+updated_at: 2021-09-16
 tags:
   - C language
   - Software
@@ -85,8 +85,8 @@ Also the test procedure requires this setting.</p>
 
 <p><a href="http://www.turkupetcentre.net/tpcclib-doc/">TPCCLIB documentation</a> is included in 
 the TPCCLIB source codes, and to reproduce the HTML version of the documentation you must install
-<a href="http://www.stack.nl/~dimitri/doxygen/">doxygen</a> documentation system. 
-To include diagrams and graphs in doxygen documents install also the 
+<a href="https://www.doxygen.nl/">Doxygen</a> documentation system. 
+To include diagrams and graphs in Doxygen documents install also the 
 <a href="http://www.graphviz.org/">dot tool</a>.</p>
 
 <p>Doxygen can be used from either Windows command prompt window or from Git bash.</p>