This is document.txt.

radio_server_template.py sends this file back, over the air, to anyone who sends it a
message with the path "document" (see the Server tab of radio_gui.py). Replace this file
with whatever you want your own CSVF2 server to hand out -- it is sent as-is, so keep it
under the modem's file size limit (MAX_FILE_BYTES in radio_modem.py, currently 10,000 bytes).
