Configuration format v1 (#1230)

* Initial pass at refactoring config (not finished)

* Don't forget current state and EDU servers

* More shifting around

* Update server key API tests

* Fix roomserver test

* Fix more tests

* Further tweaks

* Fix current state server test (sort of)

* Maybe fix appservices

* Fix client API test

* Include database connection string in database options

* Fix sync API build

* Update config test

* Fix unit tests

* Fix federation sender build

* Fix gobind build

* Set Listen address for all services in HTTP monolith mode

* Validate config, reinstate appservice derived in directory, tweaks

* Tweak federation API test

* Set MaxOpenConnections/MaxIdleConnections to previous values

* Update generate-config

cmd/generate-config/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/matrix-org/dendrite/internal/config"
+	"gopkg.in/yaml.v2"
+)
+
+func main() {
+	cfg := &config.Dendrite{}
+	cfg.Defaults()
+	cfg.Logging = []config.LogrusHook{
+		{
+			Type:  "file",
+			Level: "info",
+			Params: map[string]interface{}{
+				"path": "/var/log/dendrite",
+			},
+		},
+	}
+
+	j, err := yaml.Marshal(cfg)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(string(j))
+}