tighter version bounds for network
cleanup
document the new combinators
servant-server: add some tests for HttpVersion, IsSecure, RemoteHost and Vault
update changelogs
address Julian's feedback
remove vault test in servant-server
servant-server tests: -Werror friendly
The main `Server.Internal` module was getting a bit large for my taste.
It now contains just the instances. All the administrative utilities
are in their own dedicated modules.
Due to the delayed treatment of checks during the server interpretation,
we now have the ability to produce "better" error codes for certain
APIs. This change introduces test cases for some of these situations and
their new, desired results. These tests would mostly fail with the old
approach to routing.
