* 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>
* refactor planning into task detection
* refactoring worker tasks
* refactor
* compiles, but only balance task is registered
* compiles, but has nil exception
* avoid nil logger
* add back ec task
* setting ec log directory
* implement balance and vacuum tasks
* EC tasks will no longer fail with "file not found" errors
* Use ReceiveFile API to send locally generated shards
* distributing shard files and ecx,ecj,vif files
* generate .ecx files correctly
* do not mount all possible EC shards (0-13) on every destination
* use constants
* delete all replicas
* rename files
* pass in volume size to tasks