New HTML5 parser RFC

[withinboredom]

https://wiki.php.net/rfc/domdocument_html5_parser

Just bringing this to your attention.

[MatTheCat]

https://wiki.php.net/rfc/opt_in_dom_spec_compliance as well

[andypost]

All this 3 RFC are accepted and implemented, so library can provide a flag to use new DOM\HTMLDocument under the hood

PS: 3rd https://wiki.php.net/rfc/dom_additions_84