Add the http subdirectory only if selected in the CMake options
Add the http subdirectory only if selected in the CMake options

Signed-off-by: Fons Rademakers <1ec492889ec4314e6ce1fb58ec289eb0358186c9@cern.ch>

tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot