add ChangeLog.md, with notes for preview release 0.3.0.

Author: douzzer

ChangeLog.md

@@ -0,0 +1,43 @@
+# wolfSentry Release 0.3.0 (Dec 30, 2021)
+
+Preview Release 0.3.0 of the wolfSentry embedded firewall/IDPS has bug fixes and new features including:
+
+
+## New Ports and Examples
+
+
+#### examples/Linux-LWIP
+
+This demo uses Linux-hosted LWIP in Docker containers to show packet-level and connection-level filtering using wolfSentry.  Filtering can be by MAC, IPv4, or IPv6 address.  Demos include pre-accept TCP filtering, and filtering of ICMP packets.
+
+See examples/Linux-LWIP/README.md for the installation and usage guide, and examples/Linux-LWIP/echo-config.json for the associated wolfSentry configuration.
+
+
+#### FreeRTOS with LWIP on STM32
+
+This demo is similar to Linux-LWIP, but targets the STM32 ARM core and the STM32CubeMX or STM32CubeIDE toolchain, with a FreeRTOS+LWIP runtime.  It shows wolfSentry functionality in a fully embedded (bare metal) application.
+
+See examples/STM32/README.md for the installation and usage guide, and examples/STM32/Src/sentry.c for the compiled-in wolfSentry configuration.
+
+
+## New Features
+
+
+* Autogeneration and inclusion of wolfsentry_options.h, synchronizing applications with wolfSentry library options as built.
+
+* New APIs `wolfsentry_route_event_dispatch_[by_id]with_inited_result()`, for easy caller designation of known traffic attributes, e.g. `WOLFSENTRY_ACTION_RES_CONNECT` or `WOLFSENTRY_ACTION_RES_DISCONNECT`.
+
+* Efficient support for aligned heap allocations on targets that don't have a native aligned allocation API: `wolfsentry_free_aligned_cb_t`, `wolfsentry_allocator.free_aligned`, `wolfsentry_builtin_free_aligned()`, `wolfsentry_free_aligned()`, and `WOLFSENTRY_FREE_ALIGNED()`.
+
+* Semaphore wrappers for FreeRTOS, for use by the `wolfsentry_lock_*()` shareable-upgradeable lock facility.
+
+
+## Bug Fixes
+
+
+* `wolfsentry_route_event_dispatch_1()`: don't impose `config.penaltybox_duration` on routes with `route->meta.last_penaltybox_time == 0`.
+
+* trivial fixes for backward compat with gcc-5.4.0, re `-Wconversion` and `-Winline`.
+
+
+Please send questions or comments to [email protected]