fixes bug 199173 "IPv6:Page fails to load. No message." r=dougt sr=alecf a=sspitzer

netwerk/base/src/nsSocketTransport2.cpp

@@ -129,6 +129,7 @@ ErrorAccordingToNSPR(PRErrorCode errorCode)
         break;
     case PR_CONNECT_REFUSED_ERROR:
     case PR_NETWORK_UNREACHABLE_ERROR: // XXX need new nsresult for this!
+    case PR_HOST_UNREACHABLE_ERROR:    // XXX and this!
         rv = NS_ERROR_CONNECTION_REFUSED;
         break;
     case PR_IO_TIMEOUT_ERROR: