Improve a bit Moodle detection
Improve a bit Moodle detection

This can be tested on [this](http://fle.groupe-esa.com/login/index.php)
website

WPO-Foundation/Wappalyzer,WPO-Foundation/Wappalyzer,AliasIO/wappalyzer,WPO-Foundation/Wappalyzer,AliasIO/wappalyzer