alter des.h to be friendly with openssl/des.h (you can include both in the
same file)
make libkrb to depend on libdes. bump major.
massage various portioin of heimdal to be friendly with openssl 0.9.7b.
MIT shlib major was larger, bump the Heimdal shlib major to MIT major + 1,
so that exising installed programs using MIT libraries will continue to
function after the transition to Hiemdal.