replay.c: The KDC replay cache needs to store the database

replay.c: The KDC replay cache needs to store the database
      modification time, so that if the database is modified in
      between when it receives a request and when it receives a
      replay of the same request, it knows to throw away the
      replay cache entry and generate a new response (since the
      record in the database on which the response is based may
      have been modified).

main.c (kdc_com_err_proc): Use syslog() instead of vsyslog().

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5233 dc483132-0cff-0310-8789-dd5450dbe970