kdc_supported_enctypes does nothing.  Remove all mention of it from
documentation and test suites.

https://github.com/krb5/krb5/commit/ac5c3678bbc6295737e42bb0ac97efe341f41dfa
Commit By: tlyu
Revision: 23578
Changed Files:
U   trunk/src/config-files/kdc.conf.M
U   trunk/src/tests/dejagnu/config/default.exp