Changes since previous version:
+ add Taylor Campbell's implementation of SHA3 digests. This includes
code to calculate 224, 256, 384 and 512bit length digests.
+ change the license on all the code I wrote to be 2-clause BSD
+ modify license years for things that have been changed
+ add self-test command line option to digest(1) via the -t switch
pkgsrc changes
+ derive version number for the package automatically from the source
code