Ticket 48175 - Avoid using regex in ACL if possible
    
    Bug Description:  aci code uses regex to do substring matching for targets
                      but this is a huge overhead for a simple sequence of
                      string matching
    
    Fix Description:   directly do the str match for the initial, any, final
                       parts of the filter
    
    https://fedorahosted.org/389/ticket/48175
    
    Reviewed by: Noriko, thanks