* it is ORed with SLAP_SET_RREFARR
* - the same applies to the lset with SLAP_SET_LREFVAL and SLAP_SET_LREFARR
* - it is assumed that SLAP_SET_REFVAL implies SLAP_SET_REFARR,
* it is ORed with SLAP_SET_RREFARR
* - the same applies to the lset with SLAP_SET_LREFVAL and SLAP_SET_LREFARR
* - it is assumed that SLAP_SET_REFVAL implies SLAP_SET_REFARR,