MQTT on-message callback carries more info

• Alternate callback allows user to know qos retain and dup of received MQTT messages

Numa fix + iot symbol export updates

v1.10.5

Submodule update for internal import and numa fixes (#233)

Address issues writing large payloads with MQTT/websockets

• Fix error which surfaced when writing large payloads over secure websockets (and MQTT over websockets)

Address crash with proxied x509 provider

• Fixes a crash when creating an x509 credentials provider that uses a plaintext, proxied http connection

Nested tls support

• Added support for nested tls when using a proxy

Try-Lock fix on Windows

• Fixes a fatal assert on Windows when try-lock was called

UnifiedAgent supporting code added

• UnifiedAgent supporting code added
• Builder configuration updated
• Main ranch references updated

Blocking shutdown option

• Adds an option to the ApiHandle to allow destruction to wait for all thread-based CRT objects to terminate before completing.

Update s2n to release v0.10.19

• Update s2n to release v0.10.19

Reduced submodule path length to help on windows

• BUILD FIX: Reduced submodule path length to help on windows. From "aws-common-runtime" -> "crt".
• FEATURE: Bring back Aws::Crt::StringView and Aws::Crt::ImdsClient, which were temporarily removed in the previous release.