Feat/register phpinfo entries

[henderkes]

closes #2576

Edit: the entries are sorted now.

@dunglas I know you've worked on the watcher-go library before, perhaps you could expose a proper version number instead?

[henderkes]

@dunglas I think we should revert the last commit and make not passing the nobrotli tag a build error when libbrotli isn't available. It would shift the runtime error to a compile time error.

[dunglas]

For watcher, this is because of e-dant/watcher#102