by default.
(HMAC_SHA1_DES3_checksum): rename to SP_HMAC_SHA1_checksum and modify
to support checksumtype that are have a shorter wireformat then their
output block size.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11583 ec53bebd-3082-4978-b11e-865c3cabbd6b