* fix(weed/command) address unhandled errors
* fix(command): don't log graceful-shutdown sentinels; plug response-body leak
- s3: Serve on unix socket treated http.ErrServerClosed as fatal; now
excluded like the other Serve/ServeTLS paths in this file.
- mq_agent, mq_broker: filter grpc.ErrServerStopped so clean shutdown
doesn't log as an error.
- worker_runtime: the added decodeErr early-continue skipped
resp.Body.Close(); drop it since the existing check below already
surfaces the decode error.
- mount_std: the pre-mount Unmount commonly fails when nothing is
mounted; demote to V(1) Infof.
- fuse_std: tidy panic message to match sibling cases.
* fix(mq_broker): filter grpc.ErrServerStopped on localhost listener
The localhost listener goroutine logged any Serve error unconditionally,
which includes grpc.ErrServerStopped on graceful shutdown. Match the
main listener's check so clean stops don't surface as errors.
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Co-authored-by: Chris Lu <chris.lu@gmail.com>