Forbid TunneledDirConns 0 and PreferTunneledDirConns 0 if being a HS

Fixes bug 10849; bugfix on 0.2.1.1-alpha (I believe)

changes/bug10849_023

@@ -0,0 +1,6 @@
+  o Major bugfixes:
+    - When running a hidden service, do not allow TunneledDirConns 0;
+      this will keep the hidden service from running, and also
+      make it publish its descriptors directly over HTTP. Fixes bug 10849;
+      bugfix on 0.2.1.1-alpha.
+

src/or/config.c

@@ -4049,6 +4049,10 @@ options_validate(or_options_t *old_options, or_options_t *options,
     REJECT("If you set UseBridges, you must specify at least one bridge.");
   if (options->UseBridges && !options->TunnelDirConns)
     REJECT("If you set UseBridges, you must set TunnelDirConns.");
+  if (options->RendConfigLines &&
+      (!options->TunnelDirConns || !options->PreferTunneledDirConns))
+    REJECT("If you are running a hidden service, you must set TunnelDirConns "
+           "and PreferTunneledDirConns");
 
   for (cl = options->Bridges; cl; cl = cl->next) {
     if (parse_bridge_line(cl->value, 1)<0)