Use tcp_dissect_pdus() for DLSw-over-TCP.

Use tcp_dissect_pdus() for DLSw-over-TCP.

Have the DLSw dissector reject packets with an unknown version field.

Leave out some more fields when dissecting Capability Exchange packets,
as they're not used in those packets.

Show numbers in hex when appropriate.

Show the individual subfields of the flow control and SSP flags fields.

Show the frame direction field with val_to_str(), and show the raw
value.

Clean up indentation.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@13019 f5534014-38df-0310-8fa8-9805f1628bb7