conversation_table: fix warning when generate documentation (doxygen)

epan/conversation_table.h:335: warning: The following parameters of add_hostlist_table_data(conv_hash_t *ch, const address *addr, guint32 port, gboolean sender, int num_frames, int num_bytes, hostlist_dissector_info_t *host_info, port_type port_type_val) are not documented:
  parameter 'host_info'
  parameter 'port_type_val'

Change-Id: I6c3b29750c856eb2665981553fcb8eecd8fe34ee
Reviewed-on: https://code.wireshark.org/review/5482
Reviewed-by: Evan Huus <eapache@gmail.com>
conversation_table: fix indent (use 4spaces) and add modelines info

Change-Id: I76784f0252dcd095a3016ed014632e2a5c09265b
Reviewed-on: https://code.wireshark.org/review/5483
Reviewed-by: Evan Huus <eapache@gmail.com>