Add brotli extension

[KapitanOczywisty]

Description

Brotli encoding is firmly established successor to gzip, and from 2017 supported by every major browser, as well server side (apache, ngnix, nodejs). Even curl used in php can be compiled with Brotli. Adding Brotli extension to php should follow that.

There is 3rd party extension https://github.com/kjdev/php-ext-brotli , but it's not even listed in PECL. However I think it should be bundled with php anyway, as optional extension - at least for now. This would allow wide adoption of this encoding and integration within php (e.g. ob_brhandler, Phar::BR).

I don't have sufficient knowledge to make PR and I'm not willing to deal with RFC process, but I hope there is someone who will get excited about that idea and can make this happen. I'll offer any help I can give.

[remicollet]

First you should be to ask @kjdev if he want to publish this extension to pecl (so opening an issue on this project)

Later, according to ext success and users feedback, can be propose for merge in php-src in a new major version (pecl extension will be available for older ones)

[cmb69]

I'm closing this per the comment above.

[Schiocco]

Brotli must be supported by PHP CURL as more website are using it now