Remove relay fixes

- clear subscriptions tracked when closing relay
- join and pop queue_threads when removing relay

nostr/relay.py

@@ -68,8 +68,10 @@ class Relay:
             )
 
     def close(self):
-        self.ws.close()
         self.shutdown = True
+        self.ws.close()
+        with self.lock:
+            self.subscriptions = {}
 
     def check_reconnect(self):
         try:

nostr/relay_manager.py

@@ -27,10 +27,15 @@ class RelayManager:
         self.relays[url] = relay
 
     def remove_relay(self, url: str):
+        if url in self.relays:
             self.relays[url].close()
-        self.relays.pop(url)
+            self.relays.pop(url, None)
+        if url in self.threads:
             self.threads[url].join(timeout=1)
-        self.threads.pop(url)        
+            self.threads.pop(url, None)
+        if url in self.queue_threads:
+            self.queue_threads[url].join(timeout=1)
+            self.queue_threads.pop(url, None)
 
     def add_subscription(self, id: str, filters: Filters):
         for relay in self.relays.values():