Update understanding-model-view-controller.rst

better french sentence
Merge pull request #1690 from cypc/patch-1

Update understanding-model-view-controller.rst
Added Options -Indexes to webroot .htaccess

This will prevent unauthorized users from viewing directories underneath /webroot
Merge pull request #1691 from 12earth/patch-1

Added Options -Indexes to webroot .htaccess
Revert "Added Options -Indexes to webroot .htaccess"
Merge pull request #1692 from cakephp/revert-1691-patch-1

Revert "Added Options -Indexes to webroot .htaccess"