From Dinesh Dutt:

From Dinesh Dutt:
    - conversation.[ch] - To support not setting port2 on matching a
      conversation. This is used by protocols such as iSNS in which the client
      registers a TCP/UDP port with the server for notifications and the server
      sends notifications to this port from different source ports.
    - packet-isns.c - Added support for handling zero-length TLVs and ESI & SCN
      frames (when registering an SCN/ESI port, a conversation dissector is
      setup).

svn path=/trunk/; revision=11320