https://validator.w3.org/https://html5.validator.nu/https://www.w3schools.com/https://www.w3schools.com/browsers/browsers_stats.asphttps://www.alvit.de/handbook/https://www.devside.net/https://www.w3.org/https://www.apache.org/https://www.flossuk.org/ (Rebranded https://www.ukuug.org/)https://addons.mozilla.org/en-US/firefox/extensions/https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtmlhttps://www.ietf.org/rfc/rfc2616.txthttps://www.faqs.org/docs/Linux-HOWTO/SSL-Certificates-HOWTO.htmlhttps://www.moserware.com/2009/06/first-few-milliseconds-of-https.html
https://github.com/overlib/overlib The original site https://www.bosrup.com/web/overlib/ no longer exists.https://jigsaw.w3.org/css-validator/https://www.csszengarden.com/https://httpd.apache.org/info/css-security/https://en.wikipedia.org/wiki/Cross-site_scriptinghttps://bobby-tables.com/about.htmlReturn to tutorial home.
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