CID 354665: Unchecked return value in bin/named/server.c

In !6362 (merged) putstr() return values were not being checked (we do it 212 out of 221 times elsewhere in the code):

*** CID 354665:    (CHECKED_RETURN)
/bin/named/server.c: 16646 in named_server_fetchlimit()
16640     		}
16641     
16642     		if (!first) {
16643     			putstr(text, "\n");
16644     		}
16645     		putstr(text, "Rate limited servers, view ");
>>>     CID 354665:    (CHECKED_RETURN)
>>>     Calling "putstr" without checking return value (as is done elsewhere 212 out of 221 times).
16646     		putstr(text, view->name);
16647     
16648     		dns_adb_getquota(view->adb, &val, NULL, NULL, NULL, NULL);
16649     		s = snprintf(tbuf, sizeof(tbuf),
16650     			     " (fetches-per-server %u):", val);
16651     		if (s < 0 || (unsigned)s > sizeof(tbuf)) {
/bin/named/server.c: 16645 in named_server_fetchlimit()
16639     			continue;
16640     		}
16641     
16642     		if (!first) {
16643     			putstr(text, "\n");
16644     		}
>>>     CID 354665:    (CHECKED_RETURN)
>>>     Calling "putstr" without checking return value (as is done elsewhere 212 out of 221 times).
16645     		putstr(text, "Rate limited servers, view ");
16646     		putstr(text, view->name);
16647     
16648     		dns_adb_getquota(view->adb, &val, NULL, NULL, NULL, NULL);
16649     		s = snprintf(tbuf, sizeof(tbuf),
16650     			     " (fetches-per-server %u):", val);

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