README: Add warning about new user limits and entering maintenance mode

Issue: #92

README.md

@@ -4,6 +4,17 @@ Replacement for the EasyRTC p2p client to use a Jitsi relay server for A/V. It h
 
 First tests with 4-5 players resulted in ~700kbit/s upload and ~ 1Mbit/s download rate for each player.
 
+| :warning: [Limit of 5 users when using the default Public Jitsi Meet server](https://github.com/luvolondon/fvtt-module-jitsiwebrtc/issues/92) |
+| --------------------------------------------------------------------------------------------------------------------------------------------- |
+
+> Starting early December, 2021, Jitsi seems to have added a setting to their beta public Jitsi Meet server which limits the number of users who can send video to 5.
+>
+> You can attempt to get around this by setting your Jitsi server choice to `Custom Server` and using the Server Address `meet.jit.si` with no Username or Password. However, many users previously reported connection issues with using the non-beta version of the public Jitsi Meet server. It is also possible that the 5-user limit will be implemented on this server in the future. You can also run your own private Jitsi Meet server and configure the limit to a value that works for you.
+>
+> However, I highly suggest instead switching to the newer [LiveKit AVClient](https://foundryvtt.com/packages/avclient-livekit) module. I have found LiveKit to be a much more stable A/V platform to work with and the server much easier to run. There are currently no free public LiveKit servers. There are links on the module page to guides on running your own server, and I (bekit) also provide a highly available cluster of LiveKit servers with nodes in multiple parts of the world. To cover my expenses, this cluster is only available to subscribers of [my Patreon](https://www.patreon.com/bekit).
+>
+> Due to ongoing issues both developing and using the Jitsi module, I will no longer be actively developing it. I will continue to make minor adjustments and bug fixes, but this module may soon enter a deprecated state unless another developer would like to take over work on it.
+
 ## Installation
 
 You can install this module by using the following manifest URL: https://github.com/luvolondon/fvtt-module-jitsiwebrtc/releases/latest/download/module.json