1.0.9 (2020-03-18)

Below are all changes since 1.0.8.5 release:

Edge Hub

Update Microsoft.Azure.Devices.Client to version 1.23.1 (04f752e)
Update Microsoft.Azure.Devices to version 1.19.0 (3e527bc)
AMQP Heartbeat feature for edgeHub (8f26e82)
Install Trust Bundle in EdgeAgent and EdgeHub (2847ffc)
Add support for Queue length metric in EdgeHub (4ce6aa4)
Direct method calls now support multibyte utf8 encoded characters in payload (bfc87a8)
Update Twin max property depth and length limits to match IoTHub (2d69f78)
Update .NET core version to 2.1.13 (6b27f06)
Metrics in EdgeHub (f93c6f3)
Support for forwarding ASC property in messages (fe1fcf6)

Use parallel processing for subscription processing (eac1a18)
Set timeout on edgeHub's side for device and module client's OpenAsync (1d37dc9)
Hotfix Linux ARM32 and ARM64 security vulnerability by updating base dotnet core runtime images (fa634ef)
Use LogLevel to limit RocksDB LOG file size (c984f63)
Dispose all clients when network disconnection (4269881)
Fix Connect to cloud lock (fbcc45a)
Fix offline restart for edgeHub (faa2bfb)
Metrics fixes (c1f5ae4)
Update Windows base images for arm32 and amd64 - Windows Security Fix (dcebcd1)
Fix flag typo (5d8e6b0)
Fix edgeHub crash when using experimental features (5c7dfe9)
Fix message loss during transient network scenarios (ada2042)
Fix message ordering during transient network scenarios (25ebf58)
Update Twin property value validation to apply 4K property value length limit (4acce35)
Set max rocksdb write-ahead-log size to 512MB (1853388)
Fix iotedge version passed instead of client version (4b335d2)
Fix delay in module 2 module messages (6907bef)
Add back V0 metrics (0301448)
Change tags for messages_sent metric (6376d92)
Fix leaking event handlers in offline scenario (4f05275)
Fix handling cloud subscriptions if a feedback message is received multiple times (f9d1e07)
Fix handling connections with no product information (bb31324)
Initialize EdgeHub before starting protocol heads (32888fa)

Hotfix Linux ARM32 and ARM64 security vulnerability by updating base dotnet core runtime images (fa634ef)
Use LogLevel to limit RocksDB LOG file size (c984f63)
Metrics fixes (c1f5ae4)
Update Windows base images for arm32 and amd64 - Windows Security Fix (dcebcd1)
Update deployment status to "success" if there is no deployment change (ee0ce67)
Set max rocksdb write-ahead-log size to 512MB (a49cca1)
Fix iotedge version passed instead of client version (4b335d2)
Fix desired property updates with empty patch (46c77a5)
Fix getting status of failed tasks (bd51b6b)

Add rust-toolchain file instead of always using stable (2676621)
Change DPS provisioning check error to warning (86d44ea)
Update rust to 1.40.0 (f7a14fd)
Allow the user to specify auto generated certificate expiry (d0f6ed3)
Add a new external provisioning mode that uses a hosting environment endpoint for retrieving device specific information (539efad)
Support for hybrid X.509 certificate authentication for IoT Edge (f012c28)
Add support for additional container network configuration to support IPv6-only devices (9001b8e)
Use file URIs for X.509 identity certificates (34f833c)
Remove Edge identity certificate auto generation (81fbdf4)

Fix Windows build to compile against openssl 1.1.1 (acf6bf3)
Make auto_generated_cert_lifetime not required (319a020)
Fix verbiage for edge check certificate warning (e468d03)
Changed ASN1 encoding of Basic Constrains/CA (3fee6d2)
Fix "storage directories are mounted from host" checks to account for mounts of parent directories (666313b)
Show certificate expiry in self-signed certs warning (bb9b40c)
Don't restart iotedged when config.yaml isn't ready (1570c2c)
Add timeout to workload api operations (da97168)
Sort iotedge list output by module name (0ea4943)
Should not reconfigure when DPS reprovisioning from backup (8d36200)

Link to the iotedge project repo release, where you can get the 1.0.9 source code: https://github.com/Azure/iotedge/releases/tag/1.0.9