Change in installer to hide --update option until it works. Fixes bug 216

Change-Id: Ib6b18ac14be69a835f42b55be415f228d6e39dbe
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_from_source.sh b/installers/install_from_source.sh
index 5a87068..a8b4e11 100755
--- a/installers/install_from_source.sh
+++ b/installers/install_from_source.sh
@@ -24,8 +24,8 @@
     echo -e "                    ..."
     echo -e "     --develop:     (deprecated, use '-b master') install OSM from source code using the master branch"
     echo -e "     --nat:         install only NAT rules"
-    echo -e "     --update:      update to the latest stable release or to the latest commit if using a specific branch"
-    echo -e "     --showopts:    show current options"
+#    echo -e "     --update:      update to the latest stable release or to the latest commit if using a specific branch"
+    echo -e "     --showopts:    print chosen options and exit (only for debugging)"
     echo -e "     -h / --help:   print this help"
 }