In esp_dte_handle_line(), it tokenize the data to call handlers separately
for each *line*. So it needs to post the tokenized data when report unknown
line instead of the first token (which could be a '\r' in my test).
Fixes: 336de29413 ("Examples/pppos_client: Fix manual parsing to accept unexpected lines")
Signed-off-by: Axel Lin <axel.lin@gmail.com>
0a15cc5e5a