ads_cached_connection() in winbindd_ads.c: tickets expired?

[Luke Howard]

Have a look at the endtime field of krb5_creds - that's what we use to
figure out when to refresh credentials. Not sure whether this is a
Heimdal-ism though.

typedef struct krb5_times {
  krb5_timestamp authtime;
  krb5_timestamp starttime;
  krb5_timestamp endtime;
  krb5_timestamp renew_till;
} krb5_times;

typedef struct krb5_creds {
    krb5_principal client;
    krb5_principal server;
    krb5_keyblock session;
    krb5_times times;
    krb5_data ticket;
    krb5_data second_ticket;
    krb5_authdata authdata;
    krb5_addresses addresses;
    krb5_ticket_flags flags;
} krb5_creds;

-- Luke