Check that domains contain dots

src/freedombone-controlpanel

@@ -1846,9 +1846,11 @@ function domain_blocking_add {
         0)
             blocked_domain=$(<$data)
             if [ ${#blocked_domain} -gt 2 ]; then
-                firewall_block_domain $blocked_domain
-                dialog --title $"Block a domain" \
-                       --msgbox $"The domain $blocked_domain has been blocked" 6 40
+                if [[ "${blocked_domain}" == '.'  ]]; then
+                    firewall_block_domain $blocked_domain
+                    dialog --title $"Block a domain" \
+                           --msgbox $"The domain $blocked_domain has been blocked" 6 40
+                fi
             fi
             ;;
     esac
@@ -1865,9 +1867,11 @@ function domain_blocking_remove {
         0)
             unblocked_domain=$(<$data)
             if [ ${#unblocked_domain} -gt 2 ]; then
-                firewall_unblock_domain $unblocked_domain
-                dialog --title $"Unblock a domain" \
-                       --msgbox $"The domain $unblocked_domain has been unblocked" 6 40
+                if [[ "${unblocked_domain}" == '.'  ]]; then
+                    firewall_unblock_domain $unblocked_domain
+                    dialog --title $"Unblock a domain" \
+                           --msgbox $"The domain $unblocked_domain has been unblocked" 6 40
+                fi
             fi
             ;;
     esac