Implement Typing server (#567)

* update gomatrixserverlib

* Make removeUser public

* Implement api.TypingServerInputAPI

* Integrate the typing server component, create kafka topic

* Add typing server cmd for multiprocess dendrite

vendor/src/github.com/matrix-org/gomatrixserverlib/edu.go

@@ -0,0 +1,23 @@
+/* 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 gomatrixserverlib
+
+// EDU represents a EDU received via federation
+// https://matrix.org/docs/spec/server_server/unstable.html#edus
+type EDU struct {
+	Type        string  `json:"edu_type"`
+	Origin      string  `json:"origin"`
+	Destination string  `json:"destination"`
+	Content     RawJSON `json:"content"`
+}

vendor/src/github.com/matrix-org/gomatrixserverlib/eventauth.go

@@ -47,6 +47,8 @@ const (
 	MRoomHistoryVisibility = "m.room.history_visibility"
 	// MRoomRedaction https://matrix.org/docs/spec/client_server/r0.2.0.html#id21
 	MRoomRedaction = "m.room.redaction"
+	// MTyping https://matrix.org/docs/spec/client_server/r0.3.0.html#m-typing
+	MTyping = "m.typing"
 )
 
 // StateNeeded lists the event types and state_keys needed to authenticate an event.

vendor/src/github.com/matrix-org/gomatrixserverlib/linter.json

@@ -11,7 +11,7 @@
         "structcheck",
         "maligned",
         "ineffassign",
-        "gas",
+        "gosec",
         "misspell",
         "gosimple",
         "megacheck",

vendor/src/github.com/matrix-org/gomatrixserverlib/transaction.go

@@ -16,11 +16,14 @@ type Transaction struct {
 	// the destination server. Multiple transactions can be sent by the origin
 	// server to the destination server in parallel so there may be more than
 	// one previous transaction.
-	PreviousIDs []TransactionID `json:"previous_ids"`
+	PreviousIDs []TransactionID `json:"previous_ids,omitempty"`
 	// The room events pushed from the origin server to the destination server
 	// by this transaction. The events should either be events that originate
 	// on the origin server or be join m.room.member events.
 	PDUs []Event `json:"pdus"`
+	// The ephemeral events pushed from origin server to destination server
+	// by this transaction. The events must orginate at the origin server.
+	EDUs []EDU `json:"edus,omitempty"`
 }
 
 // A TransactionID identifies a transaction sent by a matrix server to another