* add ui for maintenance
* valid config loading. fix workers page.
* refactor
* grpc between admin and workers
* add a long-running bidirectional grpc call between admin and worker
* use the grpc call to heartbeat
* use the grpc call to communicate
* worker can remove the http client
* admin uses http port + 10000 as its default grpc port
* one task one package
* handles connection failures gracefully with exponential backoff
* grpc with insecure tls
* grpc with optional tls
* fix detecting tls
* change time config from nano seconds to seconds
* add tasks with 3 interfaces
* compiles reducing hard coded
* remove a couple of tasks
* remove hard coded references
* reduce hard coded values
* remove hard coded values
* remove hard coded from templ
* refactor maintenance package
* fix import cycle
* simplify
* simplify
* auto register
* auto register factory
* auto register task types
* self register types
* refactor
* simplify
* remove one task
* register ui
* lazy init executor factories
* use registered task types
* DefaultWorkerConfig remove hard coded task types
* remove more hard coded
* implement get maintenance task
* dynamic task configuration
* "System Settings" should only have system level settings
* adjust menu for tasks
* ensure menu not collapsed
* render job configuration well
* use templ for ui of task configuration
* fix ordering
* fix bugs
* saving duration in seconds
* use value and unit for duration
* Delete WORKER_REFACTORING_PLAN.md
* Delete maintenance.json
* Delete custom_worker_example.go
* remove address from workers
* remove old code from ec task
* remove creating collection button
* reconnect with exponential backoff
* worker use security.toml
* start admin server with tls info from security.toml
* fix "weed admin" cli description
* remove old raft servers if they don't answer to pings for too long
add ping durations as options
rename ping fields
fix some todos
get masters through masterclient
raft remove server from leader
use raft servers to ping them
CheckMastersAlive for hashicorp raft only
* prepare blocking ping
* pass waitForReady as param
* pass waitForReady through all functions
* waitForReady works
* refactor
* remove unneeded params
* rollback unneeded changes
* fix
