! io: improve DynamicPipelines trait

- introduce `DynamicPipelines.State` type alias
- remove `initialPipelines` method
- introduce `process` method for easy wrapping of pipeline stage execution
! can: add `max-encryption-chunk-size` setting to ClientConnectionSettings and ServerSettings
! io: major refactoring of SslTlsSupport, fixes #544

Breaking API change because of the added `maxEncryptionChunkSize: Int` parameter on `SslTlsSupport.apply`
= examples: small update to simple-http-server example