Comma between 'next header' and 'payload length'.
Colon after 'payload length'.
It is a follow-up to commit b348069d2b
where the comma was wrongly removed.
This change adds:
year-month-day to the hours:minutes:secondes.{microseconds|nanoseconds}.
It allows to catch more issues with timestamps processing.
For some test using their own display time options, use 'SPECIAL_t' in
options.
Add support for SBFD on UDP port 7784. SBFD is different
in that packets from the reflector will be sent with *source*
port 7784; in all other BFD mechanisms, it is only the
destination port that matters. For SBFD print-udp.c has to
check both source and destination port.
