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

pkgs/python-packages/python-bitcointx/get-sha256.sh

@@ -9,7 +9,7 @@ cd $TMPDIR
 echo "Fetching latest release"
 git clone https://github.com/simplexum/python-bitcointx 2> /dev/null
 cd python-bitcointx
-latest=python-bitcointx-v1.1.1.post0
+latest=python-bitcointx-v1.1.3
 echo "Latest release is ${latest}"
 
 # GPG verification