Fix apache horizon permissions on Ubuntu 13.10

Fixes bug 1241574.

Change-Id: If6c30874267a6bf30c114146f83b2d3220f32c1a

lib/horizon

@@ -123,6 +123,11 @@ function init_horizon() {
         # Be a good citizen and use the distro tools here
         sudo touch $horizon_conf
         sudo a2ensite horizon.conf
+        if [[ "$DISTRO" == "saucy" ]]; then
+            # Ubuntu 13.10 has Require all denied in apache2.conf
+            # and requires explicit Require all granted
+            HORIZON_REQUIRE='Require all granted'
+        fi
     elif is_fedora; then
         if [[ "$os_RELEASE" -ge "18" ]]; then
             # fedora 18 has Require all denied  in its httpd.conf