pkt_dump.c:
  reads raw packet files and key files, and writes encrypted files.

pkt_dump.sh:
  shell wrapper for pkt_dump, to capture its output and return value
  in a log file.

btree.c, btree.h, list.c, list.h:
  The file format used by the prototype vault required that two linked
  lists be maintained, one which kept track of the mapping of real to
  substituted IP addresses, and one which kept track of all the
  conversations that had occurred in that segment.  This was later
  replaced by code which does the same job using a btree instead of a
  linked list.  By default the vault now uses neither one.

sample.c, sample.h, packet.h:
  prints statistics about packets for debugging purposes.

print.h:
  contains PRINT macro used to print debugging information, which by
  default does nothing.

la.csh:
  logs system activity for debugging purposes.

tests/:
  tests for pkt_dump and decrypt, used for debugging purposes.

find_ip.c, find_ip.h:
  currently unused; please ignore.

