Refactor `mullvad-relay-selector`

Implement a system built on 'queries' for selecting appropriate relays.
A query is a set of constraints which dictates which relay(s) that *can*
be chosen by the relay selector.

The user's settings can naturally be expressed as a query. The semantics
of merging two queries in a way that always prefer user settings is
defined by the new `Intersection` trait.

Split `mullvad-relay-selector` into several modules:

- `query.rs`: Definition of a query on different types of relays. This
module is integral to the new API of `mullvad-relay-selector`
- `matcher.rs`: Logic for filtering out candidate relays based on a
query.
- `detailer.rs`: Logic for deriving connection details for the selected
relay.
- `tests/`: Integration tests for the new relay selector. These tests
only use the public APIs of `RelaySelector` and make sure that the
output matches the expected output in different scenarios.

1 files changed, 2 insertions, 2 deletions

diff --git a/test/test-manager/src/tests/install.rs b/test/test-manager/src/tests/install.rs
index 8676d99b77..7dbf092f5c 100644
--- a/test/test-manager/src/tests/install.rs
+++ b/test/test-manager/src/tests/install.rs
@@ -5,7 +5,7 @@ use super::helpers::{
 use super::{Error, TestContext};
 
 use mullvad_management_interface::MullvadProxyClient;
-use mullvad_types::relay_constraints;
+use mullvad_types::{constraints::Constraint, relay_constraints};
 use test_macro::test_function;
 use test_rpc::meta::Os;
 use test_rpc::{mullvad_daemon::ServiceStatus, ServiceClient};
@@ -141,7 +141,7 @@ pub async fn test_upgrade_app(ctx: TestContext, rpc: ServiceClient) -> Result<()
     let relay_location_was_preserved = match &settings.relay_settings {
         relay_constraints::RelaySettings::Normal(relay_constraints::RelayConstraints {
             location:
-                relay_constraints::Constraint::Only(relay_constraints::LocationConstraint::Location(
+                Constraint::Only(relay_constraints::LocationConstraint::Location(
                     relay_constraints::GeographicLocationConstraint::Country(country),
                 )),
             ..