Merge branch 'bug18710_025' into maint-0.2.8

changes/bug18710

+  o Major bugfixes (DNS proxy):
+    - Stop a crash that could occur when a client running with DNSPort
+      received a query with multiple address types, where the first
+      address type was not supported. Found and fixed by Scott Dial.
+      Fixes bug 18710; bugfix on 0.2.5.4-alpha.
+

src/or/dnsserv.c

@@ -88,8 +88,6 @@ evdns_server_callback(struct evdns_server_request *req, void *data_)
   for (i = 0; i < req->nquestions; ++i) {
     if (req->questions[i]->dns_question_class != EVDNS_CLASS_INET)
       continue;
-    if (! q)
-      q = req->questions[i];
     switch (req->questions[i]->type) {
       case EVDNS_TYPE_A:
       case EVDNS_TYPE_AAAA:
@@ -97,7 +95,7 @@ evdns_server_callback(struct evdns_server_request *req, void *data_)
         /* We always pick the first one of these questions, if there is
            one. */
         if (! supported_q)
-          supported_q = q;
+          supported_q = req->questions[i];
         break;
       default:
         break;