Move IConnectionFilter to internal namespace

[davidfowl]

This API is going to change a bunch so we should internalize it.

[Drawaes]

So you can't write connection filters anymore? I have them in prod so there will be a version of released kestrel that can't be extended?

[davidfowl]

So you can't write connection filters anymore? I have them in prod so there will be a version of released kestrel that can't be extended?

It's already broken in 2.0. We could keep them public and break them again in the next version but I'd rather not do that. The .Internal namespace lets you write filters but tells you this isn't the final API.

[Drawaes]

Ahh so .internal but not internal class modifier... cool have at it

[muratg]

@DamianEdwards Are you OK with this? This will prevent breaking users (again) when we expose pipelines in the future.