Fix callback not being called when hostname case doesn't match

hostnames are supposed to be case insensitive, so check whether the
requested name matches the records we receive in a case insensitive way.

src/mdns.c

@@ -767,6 +767,10 @@ mdns_listen_probe_network(const struct mdns_ctx *ctx, const char *const names[],
                             if (!strrcmp(entry->name, names[i])) {
                                     callback(p_cookie, r, entries);
                                     break;
+                            } else if ((entry->type & RR_A || entry->type & RR_AAAA) &&
+                                    !strcasecmp (entry->name, names[i])) {
+                                    callback(p_cookie, r, entries);
+                                    break;
                             }
                     }
             }