Handle "extra" field according to specs in ALIVE2_REQ and PORT2_RESP.

Don't let the length field pollute the value of the "extra" field in
ALIVE2_REQ.  Extra was read, starting at the second byte of the two
byte length field, which meant that it was included in the result and
the last byte of the value was skipped:

    if "extra" is <<1, 2>>, return <<0, 2, 1, 2>> not <<0, 2, 2, 1>>

Increment the offset correctly when sending PORT2_RESP, in order to
make sure the "extra" field won't be truncated:

    if "extra" is <<>>, return <<0, 0>> not <<0>>
    if "extra" is <<1, 2>>, return <<0, 2, 1, 2>> not <<0, 2, 1>>

Allow null characters in "extra".

0 files changed, 0 insertions, 0 deletions