Log Message:
Update to 0.30 (distfile site changed for newer releases, too):

hashcash-0.30 - 04-Mar-2004 - Adam Back <adam@cypherspace.org>

        * make -cX check multiple X-Hashcash lines until it finds the
          right one.  Bug reported by Kyle Hasselbacher <kyle@toehold.com>.

hashcash-0.29 - 04-Mar-2004 - Adam Back <adam@cypherspace.org>

        * fix prototype mismatch of function hashcash_check in
          hashcash.h vs libhc.c which caused compile failure on
          openBSD and freeBSD

        * change to make it compile on MAC OSX (need to recognize OSX
          and treat as unix like for headers to include)

        * change to make it compile on solaris 9 (and POSIX / SVR
          systems in general).  Turns out putenv(3) is more portable
          than setenv(3) / unsetenv(3)

        * update sha1 man page to name it sha1-hashcash to avoid collision
          with openssl sha1(1).  By default with openssl there is not
          actually any program named sha1, rather sha1 is a subprogram of
          openssl invoked "openssl sha1".  However I think it may still be
          possible to compile that as a separate program or symlink sha1 to
          openssl to get that.

        * update sha1 man pages to refer to the other common sha1
          implementations.

        * update LICENSE request