Multi-personality polylith binary (#1552)

* Initial work oon multipersonality binary

* Remove old binaries

* Monolith and polylith binaries

* Better logging

* dendrite-poly-multi

* Fix path

* Copyright notices etc

* Tweaks

* Update Docker, INSTALL.md

* Take first argument if flags package doesn't find any args

* Postgres 9.6 or later, fix some more Docker stuff

* Don't create unnecessary e2ekey DB

* Run go mod tidy

cmd/dendrite-edu-server/main.go

@@ -1,41 +0,0 @@
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package main
-
-import (
-	_ "net/http/pprof"
-
-	"github.com/matrix-org/dendrite/eduserver"
-	"github.com/matrix-org/dendrite/eduserver/cache"
-	"github.com/matrix-org/dendrite/internal/setup"
-	"github.com/sirupsen/logrus"
-)
-
-func main() {
-	cfg := setup.ParseFlags(false)
-	base := setup.NewBaseDendrite(cfg, "EDUServerAPI", true)
-	defer func() {
-		if err := base.Close(); err != nil {
-			logrus.WithError(err).Warn("BaseDendrite close failed")
-		}
-	}()
-
-	intAPI := eduserver.NewInternalAPI(base, cache.New(), base.UserAPIClient())
-	eduserver.AddInternalRoutes(base.InternalAPIMux, intAPI)
-
-	base.SetupAndServeHTTP(
-		base.Cfg.EDUServer.InternalAPI.Listen, // internal listener
-		setup.NoListener,                      // external listener
-		nil, nil,
-	)
-}