Delay closing files on channels removed from the config

This introduces an up to 10 second delay if a SIGINT is received just after changing the config. I can't be bothered to integrate this with Storage.run and overly complicate things.

irclog.py

@@ -638,6 +638,11 @@ class Storage:
 		self.config = config
 		self.paths = {channel['ircchannel']: channel['path'] for channel in self.config['channels'].values()}
 
+		# Since the PART messages will still arrive for the removed channels, only close those files after a little while.
+		asyncio.create_task(self.delayed_close_files(channelsRemoved))
+
+	async def delayed_close_files(self, channelsRemoved):
+		await asyncio.sleep(10)
 		for channel in channelsRemoved:
 			if channel in self.files:
 				self.logger.debug(f'Closing file for {channel!r}')