Fix rtt, including bug in time compute

hbd/server/dns.py

@@ -136,16 +136,7 @@ async def dns_update_worker(
             )
             if err:
                 m += f", DNS update failed: {err}"
-                if pushmsg:
-                    try:
-                        await loop.run_in_executor(
-                            None,
-                            pushmsg,
-                            "error: nsupdate failed",
-                            f"{name}.dy.{dyndomain}: {m}",
-                        )
-                    except Exception:
-                        pass
+                logger.error("DNS update failed for %s: %s", name, err)
             else:
                 m += ", DNS updated."
 
@@ -171,7 +162,6 @@ def start_dns_worker(
     hbdclass,
     cfg: dict,
     log: Optional[callable] = None,
-    pushmsg: Optional[callable] = None,
     loop: Optional[asyncio.AbstractEventLoop] = None,
 ):
     """Start the async DNS worker and return the Task.
@@ -218,7 +208,7 @@ def start_dns_worker(
 
     task = loop.create_task(
         dns_update_worker(
-            hbdclass, cfg, async_queue=async_q, log=log, pushmsg=pushmsg, loop=loop
+            hbdclass, cfg, async_queue=async_q, log=log, loop=loop
         )
     )
     return task