[add] Voice gateway and RTC server to submodules

.gitmodules

@@ -69,3 +69,11 @@
 	branch = master
 [submodule "ui"]
 	branch = master
+[submodule "fosscord-voice-gateway"]
+	path = fosscord-voice-gateway
+	url = https://github.com/fosscord/fosscord-voice-gateway
+	branch = master
+[submodule "fosscord-rtc"]
+	path = fosscord-rtc
+	url = https://github.com/fosscord/fosscord-rtc
+	branch = master

README.md

@@ -52,6 +52,7 @@ If we are finished we'll host our own support server.
 | [Gateway](https://github.com/fosscord/fosscord-gateway) | Fosscord WebSocket Gateway Server for fosscord-client |
   [Docs](https://github.com/fosscord/fosscord-docs) | Documentation for Fosscord |
 | [WebRTC Server](https://github.com/fosscord/fosscord-rtc) | Fosscord voice and video server |
+| [Voice Gateway](https://github.com/fosscord/fosscord-voice-gateway) | Fosscord voice gateway |
 | [Server-Util](https://github.com/fosscord/fosscord-server-util) | Utility functions for the all server repositories |
 | [Dashboard](https://github.com/fosscord/fosscord-dashboard) | An admin dashboard for fosscord-server \(analytics, settings, administration, trust & safety\) |
 | [Client](https://github.com/fosscord/fosscord-client) | Fosscord Client compatible with fosscord-server and discord.com |