joinmarket: 0.9.4 -> 0.9.5

Notes
- We can no longer test for `unknown error in JSON-RPC`. `jm-ob-watcher`
  now simply outputs `Starting ob-watcher`. Tested working on
  https://nixbitcoin.org/orderbook.
- Removed Agora IRC server since it is offline semi-permanently. Should
  probably also be removed upstream.
- Includes patch for
  https://github.com/JoinMarket-Org/joinmarket-clientserver/issues/1193

modules/joinmarket.nix

@@ -150,16 +150,8 @@ let
     usessl = false
     ${socks5Settings}
 
-    # agora.anarplex.net
-    [MESSAGING:server3]
-    host = vxecvd6lc4giwtasjhgbrr3eop6pzq6i5rveracktioneunalgqlwfad.onion
-    channel = joinmarket-pit
-    port = 6667
-    usessl = false
-    ${socks5Settings}
-
     # ilita
-    [MESSAGING:server4]
+    [MESSAGING:server3]
     host = ilitafrzzgxymv6umx2ux7kbz3imyeko6cnqkvy4nisjjj4qpqkrptid.onion
     channel = joinmarket-pit
     port = 6667