DOC: fix links in Cookbook

Documentation/Cookbook/rst/index.rst

 Welcome to Orfeo ToolBox!
 =========================
 
-`Orfeo ToolBox (OTB) <http://orfeo-toolbox.org>`_ is an open-source project for
+`Orfeo ToolBox (OTB) <https://www.orfeo-toolbox.org/>`_ is an open-source project for
 state-of-the-art remote sensing. Built on the shoulders of the open-source
 geospatial community, it can process high resolution optical, multispectral and
 radar images at the terabyte scale. A wide variety of applications are
@@ -32,7 +32,7 @@ joining `our community <https://www.orfeo-toolbox.org/community/>`_ and
 For other documentation, be sure to read:
 
 - OTB's website: `www.orfeo-toolbox.org <https://www.orfeo-toolbox.org/>`_
-- `Doxygen <http://orfeo-toolbox.org/doxygen/>`_, for exhaustive documentation
+- `Doxygen <https://www.orfeo-toolbox.org/doxygen/>`_, for exhaustive documentation
   of the C++ API.
 
 Table of Contents

Documentation/Cookbook/rst/recipes/pbclassif.rst

@@ -475,7 +475,7 @@ to positive reference samples (either represented as a raster labeled
 image or as a vector data containing the reference classes). It will
 compute the confusion matrix and precision, recall and F-score of each
 class too, based on the
-`ConfusionMatrixCalculator <http://www.orfeo-toolbox.org/doxygen-current/classotb_1_1ConfusionMatrixCalculator.html>`_ 
+`ConfusionMatrixCalculator <https://www.orfeo-toolbox.org/doxygen/classotb_1_1ConfusionMatrixCalculator.html>`_ 
 class.
 
 If you have made an unsupervised classification, it must be specified