Ther3 are two global ipaConfig options to disable undesirable writes that
have performance impact.
The "KDC:Disable Last Success" will disable writing back to ldap the last
successful AS Request time (successful kinit)
The "KDC:Disable Lockout" will disable completely writing back lockout
related data. This means lockout policies will stop working.
https://fedorahosted.org/freeipa/ticket/2734
On a failed bind this will update krbLoginFailedCount and krbLastFailedAuth
and will potentially fail the bind altogether.
On a successful bind it will zero krbLoginFailedCount and set
krbLastSuccessfulAuth.
This will also enforce locked-out accounts.
See http://k5wiki.kerberos.org/wiki/Projects/Lockout for details on
kerberos lockout.
ticket 343
