webhooks: Add client_info parameter to "info" webhook

Allow clients to send their version info to klipper and arrange for
that info to be logged.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/queuelogger.py

@@ -39,6 +39,9 @@ class QueueListener(logging.handlers.TimedRotatingFileHandler):
         self.bg_queue.put_nowait(None)
         self.bg_thread.join()
     def set_rollover_info(self, name, info):
+        if info is None:
+            self.rollover_info.pop(name, None)
+            return
         self.rollover_info[name] = info
     def clear_rollover_info(self):
         self.rollover_info.clear()