pull up r24002 from trunk

pull up r24002 from trunk

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 r24002 | ghudson | 2010-05-10 18:23:57 -0400 (Mon, 10 May 2010) | 14 lines

 ticket: 6718
 subject: Make KADM5_FAIL_AUTH_COUNT_INCREMENT more robust with LDAP
 target_version: 1.8.2
 tags: pullup

 In krb5_ldap_put_principal, use krb5_get_attributes_mask to determine
 whether krbLoginFailedCount existed on the entry when it was
 retrieved.  If it didn't exist, don't try to use LDAP_MOD_INCREMENT,
 and don't assert an old value when not using LDAP_MOD_INCREMENT.

 Also, create the krbLoginFailedCount attribute when creating new
 entries.  This allows us to use LDAP_MOD_INCREMENT during the first
 failed login (if the server supports it), avoiding a race condition.

ticket: 6718
version_fixed: 1.8.2
status: resolved

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-8@24061 dc483132-0cff-0310-8789-dd5450dbe970