CID 432259: Sizeof not portable in lib/dns/remote.c

Coverity Scan claims the two following issues in code added in !7110 (merged):

/lib/dns/remote.c: 117 in dns_remote_init()
111     		}
112     	} else {
113     		remote->keynames = NULL;
114     	}
115     
116     	if (tlsnames != NULL) {
>>>     CID 432259:    (SIZEOF_MISMATCH)
>>>     Passing argument "count * 8UL /* sizeof (tlsnames) */" to function "isc__mem_get" and then casting the return value to "dns_name_t **" is suspicious.  In this particular case "sizeof (dns_name_t **)" happens to be equal to "sizeof (dns_name_t *)", but this is not a portable assumption.
117     		remote->tlsnames = isc_mem_get(mctx, count * sizeof(tlsnames));
118     		for (i = 0; i < count; i++) {
119     			remote->tlsnames[i] = NULL;
120     		}
121     		for (i = 0; i < count; i++) {
122     			if (tlsnames[i] != NULL) {
/lib/dns/remote.c: 99 in dns_remote_init()
93     		memmove(remote->dscps, dscp, count * sizeof(isc_dscp_t));
94     	} else {
95     		remote->dscps = NULL;
96     	}
97     
98     	if (keynames != NULL) {
>>>     CID 432259:    (SIZEOF_MISMATCH)
>>>     Passing argument "count * 8UL /* sizeof (keynames) */" to function "isc__mem_get" and then casting the return value to "dns_name_t **" is suspicious.  In this particular case "sizeof (dns_name_t **)" happens to be equal to "sizeof (dns_name_t *)", but this is not a portable assumption.
99     		remote->keynames = isc_mem_get(mctx, count * sizeof(keynames));
100     		for (i = 0; i < count; i++) {
101     			remote->keynames[i] = NULL;
102     		}
103     		for (i = 0; i < count; i++) {
104     			if (keynames[i] != NULL) {