[krbdev.mit.edu #5668] DAL changes break --with-kdc-kdb-update build

[Ken Raeburn via RT]

I just checked in revision 22518 on the trunk which makes most of the relevant code get 
compiled all the time, so we shouldn't see this problem resurface, and I think I've fixed up the 
necessary changes in function calls.  If you're willing to try it out, please let me know of any 
problems.

The code is still only enabled with a configure-time option, which we probably want to change 
someday.