ITS#7403, #6296 fix AUTHZ_BACKEND handling

c_authz_cookie should only be set on explicit Bind requests.

servers/slapd/back-ldap/bind.c

@@ -1581,7 +1581,6 @@ retry:;
 	rc = ldap_back_op_result( lc, op, rs, msgid,
 		-1, ( sendok | LDAP_BACK_BINDING ) );
 	if ( rc == LDAP_SUCCESS ) {
-		op->o_conn->c_authz_cookie = op->o_bd->be_private;
 		LDAP_BACK_CONN_ISBOUND_SET( lc );
 	}
 
@@ -2411,7 +2410,6 @@ ldap_back_proxy_authz_bind(
 				ber_bvreplace( &lc->lc_bound_ndn, &bv );
 			}
 #endif /* SLAP_AUTH_DN */
-			op->o_conn->c_authz_cookie = op->o_bd->be_private;
 			LDAP_BACK_CONN_ISBOUND_SET( lc );
 			break;
 
@@ -2482,7 +2480,6 @@ ldap_back_proxy_authz_bind(
 		 * so that referral chasing is attempted using the right
 		 * identity */
 		LDAP_BACK_CONN_ISBOUND_SET( lc );
-		op->o_conn->c_authz_cookie = op->o_bd->be_private;
 		if ( !BER_BVISNULL( binddn ) ) {
 			ber_bvreplace( &lc->lc_bound_ndn, binddn );
 		}