message: ci/travis: Fix broken link to doxygen
diff: @@ -215,7 +215,7 @@ build_and_install_opencv() {
  # Install the latest version of doxygen in the /deps folder
  ############################################################################
  install_doxygen() {
  - DOXYGEN_URL="wget doxygen.nl/files/doxygen-1.8.15.src.tar.gz"
  + DOXYGEN_URL="wget https://sourceforge.net/projects/doxygen/files/rel-1.8.15/doxygen-1.8.15.src.tar.gz"
  pushd ${DEPS_DIR}
  [ -d "doxygen" ] || {
  mkdir doxygen && wget --quiet -O - ${DOXYGEN_URL} | tar --strip-components=1 -xz -C doxygen
  