When a user don't have the permission
`$user->rights->projet->all->lire`, viewing some tasks related entities
(like `tasks/contact.php?id=1&withproject=1`) cause `Call to undefined
method Task::getProjectsAuthorizedForUser()` fatal error.

The problem is caused by calling getProjectsAuthorizedForUser on $object
insted of $projectstatic.

Revert "Code refactoring. Improve folder structure. For better project implementation. Most hosting server have a default folder public or public_html insted of htdocs, htdocs is a exclusive folder for apache web server, for example is no the same folder in NGINX."

This reverts commit e91c2c6e.

Code refactoring. Improve folder structure. For better project implementation. Most hosting server have a default folder public or public_html insted of htdocs, htdocs is a exclusive folder for apache web server, for example is no the same folder in NGINX.