Trac Ticket 396 - Account Usability Control Not Working [Bug 835238]
    
    https://fedorahosted.org/389/ticket/396
    
    Fix Description: Commit 003812911f56619f0db58ba627037644fb0f68fb
    broke the feature.  This patch is backing off the change so that
    get_entry accepts NULL pblock, which is necessary for the
    Account Usability plugin.
    (cherry picked from commit b2a926948b974ac8c64faf80dd0d3b99583e3f33)