Log unknown enctypes as unsupported in KDC

Commit 8d8e68283b599e680f9fe45eff8af397e827bd6c logs both invalid and
deprecated enctypes as "DEPRECATED:".  An invalid enctype might be too
old or marginal to be supported (like single-DES) or too new to be
recognized.  For clarity, prefix invalid enctypes with "UNSUPPORTED:"
instead.

https://github.com/krb5/krb5/commit/5ee99b0007f480f01f86340d1c30da51cc80da96
Author: Greg Hudson <ghudson@mit.edu>
Commit: 5ee99b0007f480f01f86340d1c30da51cc80da96
Branch: master
 src/kdc/kdc_util.c |   18 ++++++++++--------
 1 files changed, 10 insertions(+), 8 deletions(-)