[PATCH] krb5 ticket refresh after winbindd goes online

[boyang]

Hi, everyone:
     1. When winbindd goes from offline to online, primary domain's
online status must be updated. Trusted domains will contact the primary
domain for authentication and something else. [ in winbindd_dual.c]
      2. The krb5 ticket must be refreshed. But the
krb5_ticket_refresh_handler might not fired as soon as possible. There
can be 5 minutes lag between ticket refresh and winbindd goes online.
Apps(smbspool) relying on krb5 ticket suffers from this, we must ensure
that ticket is refreshed as soon as winbindd goes online. [in winbindd_cm.c]
     3. krb5 ticket refresh chain is broken in
krb5_ticket_refresh_handler(). when KDC is unreachable, we have to keep
the krb5 ticket refresh handler. [in winbindd_cred_cache.c]

     patch arrive in the attachment, please review them.
     Thanks!

Best
        Regards
--BoYang
4th, Dec

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