Like what I did in two commits ago, now if debug level for "frames" is
2 or more, net_ops->send and net_ops->recv now dump the data to
stdout. The format is the same of tools/ptpdump, but the time is
not showing the local time, as we miss localtime() and I don't want
to waste time recoding it.

This is an example of a bare-i386 slave requesting its master:

  send: TIME: (1363278286 - 0x5141f9ce) 1363278286.52969000
  send: ETH: 88f7 (00:25:11:86:1f:d2 -> 01:1b:19:00:00:00)
  send: VERSION: 2 (type 1, len 44, domain 0)
  send: FLAGS: 0x0002 (correction 0x00000000)
  send: PORT: 00-25-11-ff-fe-86-1f-d2-00-01
  send: REST: seq 2, ctrl 1, log-interval 127
  send: MESSAGE: (E) DELAY_REQ
  send: MSG-DELAY_REQ: 1363278286.052689000
  send: DUMP: payload (size 44)
  send: DUMP: 81 02 00 2c  00 00 02 00  00 00 00 00  00 00 00 00
  send: DUMP: 00 00 00 00  00 25 11 ff  fe 86 1f d2  00 01 00 02
  send: DUMP: 01 7f 00 00  51 41 f9 ce  03 23 f8 68
  diag-frames-1-eth0: SENT 44 bytes at 1363278286.052969000 (delay_req)

This is a bare-i386 master receiving the same frame:

  recv: TIME: (1363278286 - 0x5141f9ce) 1363278286.92899000
  recv: ETH: 88f7 (00:25:11:86:1f:d2 -> 01:1b:19:00:00:00)
  recv: VERSION: 2 (type 1, len 44, domain 0)
  recv: FLAGS: 0x0002 (correction 0x00000000)
  recv: PORT: 00-25-11-ff-fe-86-1f-d2-00-01
  recv: REST: seq 2, ctrl 1, log-interval 127
  recv: MESSAGE: (E) DELAY_REQ
  recv: MSG-DELAY_REQ: 1363278286.052689000
  recv: TLV: too short (46 - 44 = 2)
  recv: DUMP: payload (size 46)
  recv: DUMP: 81 02 00 2c  00 00 02 00  00 00 00 00  00 00 00 00
  recv: DUMP: 00 00 00 00  00 25 11 ff  fe 86 1f d2  00 01 00 02
  recv: DUMP: 01 7f 00 00  51 41 f9 ce  03 23 f8 68  00 00
  diag-frames-1-eth0: RECV 46 bytes at 1363278286.092899000 (type 1)

And this is tools/ptprump running on the master, for the same frame:

  TIME: (1363278286 - 0x5141f9ce) 17:24:46.092814
  ETH: 88f7 (00:25:11:86:1f:d2 -> 01:1b:19:00:00:00)
  VERSION: 2 (type 1, len 44, domain 0)
  FLAGS: 0x0002 (correction 0x00000000)
  PORT: 00-25-11-ff-fe-86-1f-d2-00-01
  REST: seq 2, ctrl 1, log-interval 127
  MESSAGE: (E) DELAY_REQ
  MSG-DELAY_REQ: 1363278286.052689000
  TLV: too short (46 - 44 = 2)
  DUMP: payload (size 46)
  DUMP: 81 02 00 2c  00 00 02 00  00 00 00 00  00 00 00 00
  DUMP: 00 00 00 00  00 25 11 ff  fe 86 1f d2  00 01 00 02
  DUMP: 01 7f 00 00  51 41 f9 ce  03 23 f8 68  00 00
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>