sflowtool version 5.01

This release introduces new output formatting options:
-j = JSON, one datagram per line
-J = JSON, pretty-printed, with datagrams separated by an empty line
-L <field1,field2,...,fieldN> = line-by-line, showing only the indicated fields

sflowtool version 3.41

Print Open vSwitch datapath performance counters.

sflowtool version 3.40

Added OpenFlow port structure.

sflowtool version 3.39

Print SFP Optical counters

sflowtool version 3.38

Fix pcap_file_header.snaplen
remove "-z pad" option
print tcpInfo struct

sflowtool version 3.37

Print rtmetric and rtflow structures.
Add timestamp to grep-friendly (-g) output.

sflowtool version 3.36

Version 3.36.