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.

& review

http://php.net/manual/en/language.basic-syntax.phptags.php

upgrade were not yet received. So we prepare for GPL by uniformizing
licence text keys to GPL-3+. Will move later to AGPL if all answers are
positive.

must be after parent tables).
Fix: Migration of old version

Changed $DB to $db
lower-cased "Class"

Removed all now() and sysdate() database sql inline function by a date defined by PHP ($db->idate(mktime())).
This is to be more portable, to solve problem when database server time differs from PHP server and to prepare for TZ support.