* Add support for TLS in gRPC communication between worker and volume server
* address comments
* worker: capture shared grpc.DialOption in BalanceTask registration closure
* worker: capture shared grpc.DialOption in ErasureCodingTask registration closure
* worker: capture shared grpc.DialOption in VacuumTask registration closure
* worker: use grpc.worker security configuration section for tasks
* plugin/worker: fix compilation errors by passing grpc.DialOption to task constructors
* plugin/worker: prevent double-counting in EC skip counters
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Co-authored-by: Chris Lu <chris.lu@gmail.com>
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