Permissions on collections

src/freedombone-app-radicale

         mkdir -p /var/www/radicale/collections
     fi
     chown -R www-data:www-data /var/www/radicale
+    chmod -R 755 /var/www/radicale/collections
 
     # create the configuration
     echo '[server]' >  ${RADICALE_DIRECTORY}/config