QNX preview v1

THIS IS AN UNSUPPORTED PREVIEW

5.1.0 release with multiple fixes and improvements related to QNX support on top.

5.1.0

Bug Fixes

• Use /proc/cmdline for root device detection instead of stat in rootfs update module
• Make Update modules generators POSIX compatible
  (MEN-8818)
• mender-update with embedded authentication (experimental) now generates a new private key if needed
  (MEN-9132)
• Prevent segfault by correctly handling dbus restarts in mender-update and mender-auth.
  Previously when systemctl stop dbus.socket or systemctl stop dbus was called, it resulted in mender-update segfault.
  (MEN-9144)
• Fix a hang when polling for deployment failed early causing no handler of API response
  to be called. Added handler call for this case, causing the deployment polling
  to continue.
  (MEN-9144)
• Correctly handle HTTP 429 responses that contain a body
  (MEN-9342)

Features

• Add User-Agent header to HTTP requests
  (MEN-1979)

• add DeviceTier configuration option
  (MEN-8650)

• Enable MENDER_USE_YAML_CPP by default. This is done in order
  to allow parsing the system_type from the topology yaml used by
  mender-orchestrator.
  (MEN-8650)

• Add system_type support for System devices. Devices with
  DeviceTier set to "system" use system_type from topology.yaml instead
  of device_type for deployment polling and manifest artifact compatibility
  checking.
  (MEN-8650)

• Add device tier support to authentication requests. The client now
  sends a 'tier' parameter in authentication requests, supporting "standard"
  (default), "micro", and "system" tiers. The tier is configurable via the
  DeviceTier configuration option, with "standard" as the default.
  (MEN-8636)

• Mender now errors if a comma is found in the NO_PROXY environment variable and explains that it only accepts space separated values.
  (ME-586)

• delegate mender_client_version inventory key to external script

  Mender Client is introducing a new package/recipe
  mender-client-version-inventory-script which will provide the Mender
  Client version not only based on mender-update version, but in the
  Mender Client as a whole, as documented in our official docs.

  Hence mender-update now expects the key to exist, and it will fallback
  to the old behaviour if not present.

  A new inventory attribute mender_client_version_provider is added to
  distinguish the two cases.
  (MEN-9016)

• Add configuration option RetryDownloadCount. It allows setting the number of
  retry attempts when artifact downloading is interrupted e.g. due to network issues.
  (ME-589)

• Handle HTTP 429 Too Many Requests in deployment polling
  (MEN-8850)

• Handle HTTP 429 Too Many Requests in inventory polling
  (MEN-8850)

• Handle HTTP 429 Too Many Requests in deployment status and logs pushing
  (MEN-8850)

Other

• Log message with version now says it's the mender-update version it reports
  (MEN-9114)
• mender-auth version is now reported in its logs
  (MEN-9114)
• mender-authd is now auto-started when called over DBus
  (MEN-9118, MEN-9144)
• libarchive can now be fetched, built and statically linked as part of the build
  (MEN-9130)