Log Message:
Update to 0.32.  Changes:

hashcash-0.32 - 09-Apr-2004 - Adam Back <adam@cypherspace.org>

	* documentation fixes

	* change multiple regexp behavior; previous algorithm only allowed
	  higher overrides; need to support both higher and lower
	  overrides.  This also required introducing -o option to join
	  regexps which are set intersections where otherwise risk of
	  uninteded override occuring and mail being rejected as spent or
	  insufficent bits.  Now revert to lexical order most specific
	  regexp first.

	* wrote test script test.sh

	* fix a few minor bugs uncovered by above test script

	* -c now means check date

	* allow -n etc with -X

	* introduced -b relative to default way of specifying bits

	* -b is no optional, if want token fully checked, but can give -b
	  default; or new relative to default -b +0.

hashcash-0.31 - 01-Apr-2004 - Adam Back <adam@cypherspace.org>

	* final 0.x version (v0 format) release before 1.x version (v1
	  format) (bug fixes / maintenance only afterwards on 0.x version)

	* remove -O3 from Makefile, use -O instead as fails on HPUX or
	  sun.

	* fix some out of date usage stuff in hashcash man page.

	* disable timing loop unless timing needed

	* fix multiple reciept bug in -cX/-cx reported by Junior Ang
	  <junior@chrysant.com>.  If you receive a mail multiple times
	  because you are on the receipt list multiple times, there will
	  be multiple hashcash headers for you.  In this case it is
	  necessary to examine the first matching, non-spent stamp.  The
	  bug was previous versions stopped on the first matching stamp
	  and then failed because it was spent.  Need to keep going and
	  check later also matching stamps until find one which is not
	  spent.

	* rationalize command line args further.  No implied -m , more
	  things that are awkward to implement but not that useful are
	  disallowed.

	* change purge operation to use read-write operations in the same
	  sdb file rather than creating a temporary file.  This makes
	  locking easier and is also aesthetically nicer.

	* add flock(2) database file write locking, and change creation
	  logic to use open(2) to avoid creation db race-condition also.

	* make resource string case insensitive by default to match email
	  semantics; add -C option to force case sensitivity if desired
	  (email addresses are converted to and stored in lower case, so
	  you have to both mint and verify with case sensitivity turned on
	  to make use of case sensitivity)

	* support minting multiple resources with multiple command line
	  args.  Also if no resources given on command line, read
	  resources from stdin.

	* support supplying multiple email addresses, for people who want
	  to accept as multiple addresses.

	* support multiple resources on purging also.

	* support multiple tokens with check mode as cmd line args, if
	  none given as args, read tokens from stdin; if -X/-x read from
	  cmd line args, then from stdin as email (matching stamp headers
	  skipping stamp headers)

	* rename default simple database to hashcash.sdb (.sdb extension),
	  to distinguish from planned support for better database.

	* fix bug in PPUTS didn't match PPRINTF

	* fixup -l, -w, -n so they support multiple tokens also

	* made use of -b optional (get the default on mint & check)

	* added "-b default" to specify default number of bits with -s
	  (otherwise no way to measure the default speed without
	  specifying the number of bits -- and when this can change over
	  time it would be inconvenient for scripting to have to
	  separately obtain this)

	* added support for wildcard email addresses with '*' wildcard
	  marker.  '*' before '@' does not match '@', '*' after '@' does
	  not match '.'.  And both email addresses must contain @ sign and
	  same number of '.' separated sub domains as wildcard address.
	  Wildcard matching is the new default.  Use -S to get plain
	  string match.  Can turn back on with -W.

	* increased size of random string to reduce chance of collisions
	  between users.  Now negligible chance of collision with typical
	  token sizes.

	* added support for regexps.  Can work from POSIX library or BSD
	  regexp library.  Use -E to get regexps.  Input is always in
	  POSIX syntax (specials are not quoted to have special action;
	  are quoted to have plain meaning).  If using BSD library still
	  give input in POSIX syntax, it's converted to BSD internally.

	* implement highest matching semantics.  Ensures that eg -c -b10
	  *@bar.invalid -b15 adam@bar.invalid will not accept a 10 bit
	  token for adam@bar.invalid.  (This is done by sorting resources
	  highest bits required first and accepting only the first highest
	  matching resource.)

	* change arg parsing so -b, -e, -g, -z, -E, -W, -S, apply to the
	  following resources and tokens, and can be changed for later
	  resources/tokens with tokens and args interspersed.  Means you
	  have to give these args before the resource/token or you will
	  get defaults.