http: set class name in http reply header
http: set class name in http reply header

Such class name may be required to reconstruct object from binary
buffer, produced with root.bin or exe.bin requests. It is important
when class name do not known at the moment when object requested.

Signed-off-by: Bertrand Bellenot <6715f273cb2881a3bfbd56f899a7173358fb0b89@cern.ch>

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