Add support for the IBM TN5250 data stream protocol.
http://wiki.wireshark.org/TN5250
From me:
Move most of the contents of the header file to the .c file.
Replace blurbs that match the hf name with NULL.
Replace empty-string blurbs with NULL.
Fix some abbreviations (hf_tn5220_xxx -> tn5220.xxx).
Make some functions static.
Cast some offset increments to unsigned to make sure we don't go backwards
(which could create a loop). This includes making most of the subdissection
functions return an unsigned number.
Use find_or_create_conversation().
svn path=/trunk/; revision=32838
Bill Meier