[krbdev.mit.edu #1791] powerpc-aix nightly build failure: 'daemon' undefined in krb524d

[Ken Raeburn via RT]

As Tom noted privately, this was almost certainly caused by my changes
to libkrb5 to have it not compile replacement versions of certain common
OS functions that the library itself doesn't need, and which don't fit
in the part of the symbol namespace we're trying to limit ourselves to.

Apparently, I missed a case in making that change....