Ticket 47807 - SLAPI_REQUESTOR_ISROOT not set for extended operation plugins
    
    Bug Description:  SLAPI_REQUESTOR_ISROOT not set for extended operation plugins
    
    Fix Description:  Added the appropriate call to slapi_pblock_set just before
                      the plugin functions get called in extendop.c
    
    https://fedorahosted.org/389/ticket/47807
    
    Patch proivded by: Jochen Schneider <scne59@gmail.com> (Thanks!!)
    
    Reviewed by: mreynolds
    
    (cherry picked from commit ce4ff66498c66a3dd0d59dc2537cc95035c95fd1)