The kdc.conf file contains KDC configuration information,
including defaults used when issuing Kerberos tickets.  Normally, you
should install your kdc.conf file in the directory
/usr/local/var/krb5kdc.  You can override the default
location by setting the environment variable KRB5_KDC_PROFILE.
The kdc.conf file is set up in the same format as the
krb5.conf file.  (See krb5.conf.)  The kdc.conf file
may contain any or all of the following three sections: