Merge pull request #82 from reneschuster/1.3.x

Quote from i-MSCP Github (hotfixes)

Code

1. Merge pull request #82 from reneschuster/1.3.x
3. Added: 40_apache2_security_headers.pl listener file for Apache2 security headers - https://securityheaders.io

Source: https://github.com/i-MSCP/imsc…fab6503b3357a937143f1e78a