Updating contrib/docs/UPGRADE

Signed-off-by: Mortier Benoit <benoit.mortier@opensides.be>

contrib/docs/UPGRADE

@@ -1265,6 +1265,32 @@ If they are old objectClasses it will warn you and you will have to remove it by
 
 !! Please read it carefully before applying !!
 
+Migrate FusionDirectory from 1.0.10 to 1.0.11
+=============================================
+
+Ubuntu 12.0.4 TLS users
+=======================
+
+Since 1.0.9.2 FusionDirectory need the php-cas library for CAS server support. This library can normally found in universe in the Ubuntu repositories 
+
+In case you did not find it, grab the deb from here and install it
+
+http://packages.ubuntu.com/trusty/all/php-cas/download
+
+and select your preferred mirror
+
+Upgrade FusionDirectory first
+=============================
+
+Upgrade FusionDirectory core package before other ones to avoid dependencies errors:
+
+apt-get install fusiondirectory
+
+Upgrade FusionDirectory schema package too.
+
+apt-get install fusiondirectory-schema
+
+
 ---
 * Further information