* origin/master: (133 commits)
  chore: restart service if it is already running and upgraded via RPM (influxdata#9970)
  feat: update etc/telegraf.conf and etc/telegraf_windows.conf (influxdata#10237)
  fix: Handle duplicate registration of protocol-buffer files gracefully. (influxdata#10188)
  fix(http_listener_v2): fix panic on close (influxdata#10132)
  feat: add Vault input plugin (influxdata#10198)
  feat: support aws managed service for prometheus (influxdata#10202)
  fix: Make telegraf compile on Windows with golang 1.16.2 (influxdata#10246)
  Update changelog
  feat: Modbus add per-request tags (influxdata#10231)
  fix: Implement NaN and inf handling for elasticsearch output (influxdata#10196)
  feat: add nomad input plugin (influxdata#10106)
  fix: Print loaded plugins and deprecations for once and test (influxdata#10205)
  fix: eliminate MIB dependency for ifname processor (influxdata#10214)
  feat: Optimize locking for SNMP MIBs loading. (influxdata#10206)
  feat: Add SMART plugin concurrency configuration option, nvme-cli v1.14+ support and lint fixes. (influxdata#10150)
  feat: update configs (influxdata#10236)
  fix(inputs/kube_inventory): set TLS server name config properly (influxdata#9975)
  fix: Sudden close of Telegraf caused by OPC UA input plugin (influxdata#10230)
  fix: bump github.com/eclipse/paho.mqtt.golang from 1.3.0 to 1.3.5 (influxdata#9913)
  fix: json_v2 parser timestamp setting (influxdata#10221)
  fix: ensure graylog spec fields not prefixed with '_' (influxdata#10209)
  docs: remove duplicate links in CONTRIBUTING.md (influxdata#10218)
  fix: pool detection and metrics gathering for ZFS >= 2.1.x (influxdata#10099)
  fix: parallelism fix for ifname processor (influxdata#10007)
  chore: Forbids "log" package only for aggregators, inputs, outputs, parsers and processors (influxdata#10191)
  docs: address documentation gap when running telegraf in k8s (influxdata#10215)
  feat: update etc/telegraf.conf and etc/telegraf_windows.conf (influxdata#10211)
  fix: mqtt topic extracting no longer requires all three fields (influxdata#10208)
  fix: windows service - graceful shutdown of telegraf (influxdata#9616)
  feat: update etc/telegraf.conf and etc/telegraf_windows.conf (influxdata#10201)
  feat: Modbus support multiple slaves (gateway feature) (influxdata#9279)
  fix: Revert unintented corruption of the Makefile from influxdata#10200. (influxdata#10203)
  chore: remove triggering update-config bot in CI (influxdata#10195)
  Update changelog
  feat: Implement deprecation infrastructure (influxdata#10200)
  fix: extra lock on init for safety (influxdata#10199)
  fix: resolve influxdata#10027 (influxdata#10112)
  fix: register bigquery to output plugins influxdata#10177 (influxdata#10178)
  fix: sysstat use unique temp file vs hard-coded (influxdata#10165)
  refactor: snmp to use gosmi (influxdata#9518)
  ...