src/po_hi_transport.c
   - Update transport functions, use
     a dynamic function table to store
     the function to be call for each device to send data.
   - Introduce a static __po_hi_send_output, remove the old
     generated one.
   - Introduce the following functions to help the handling
     of device driver sending functions:

     * __po_hi_transport_get_sending_func
     * __po_hi_transport_set_sending_func
     * __po_hi_transport_call_sending_func_by_port
     * __po_hi_transport_call_sending_func_by_device

   - Remove the __po_hi_transport_send_default, replace
     with a single function __po_hi_transport_send for
     both local and distributed communications.
   
   - __po_hi_transport_send is synonym for __po_hi_send_output
     and __po_hi_transport_default (backward compatibility)


 * include/po_hi_types.h
   - Update copyright header for types

 * src/drivers/po_hi_driver_sockets.c
   - Update driver, register sending function
     when starting




git-svn-id: https://tecsw.estec.esa.int/svn/taste/trunk/po-hi-c@4903 129961e7-ef38-4bb5-a8f7-c9a525a55882