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+# n-acd - IPv4 Address Conflict Detection
+
+## CHANGES WITH 2:
+
+        * All public destructors now include a variant that returns `void`.
+          This was requested for easier integration with `glib` and friends.
+          Similar to the `cleanup` variants, these variants are denoted by a
+          single-character function-name suffix. E.g., `n_acd_freev()`
+
+        * A fallback to `CLOCK_MONOTONIC` is now provided in case
+          `CLOCK_BOOTTIME` is not supported by the kernel. Note that this is in
+          no way signalled through the API, so if timers should follow the
+          `BOOTTIME` rather than monotonic clock, a kernel with this clock is
+          required.
+
+        * The `c-sundry` dependency is no longer needed.
+
+        * The `transport` configuration property is now mandatory for
+          `n_acd_new()`. It defaulted to `ETHERNET` before, by mistake.
+
+        * In-source documentation for the public API is now provided.
+
+        Contributions from: Beniamino Galvani, David Herrmann, David
+                            Rheinsberg, Thomas Haller, Tom Gundersen
+
+        - Tübingen, 2019-03-20
+
+## CHANGES WITH 1:
+
+        * Initial release of n-acd. This project implements the IPv4 Address
+          Conflict Detection standard as defined in RFC-5227. The state machine
+          is implemented in a shared library and provides a stable ISO-C11 API.
+          The implementation is linux-only and relies heavily on the API
+          behavior of recent linux kernel releases.
+
+        * Compared to the pre-releases, this release supports many parallel
+          probes on a single n-acd context. This reduces the number of
+          allocated network resources to O(1), based on the number of running
+          parallel probes.
+
+        * The n-acd project is now dual-licensed: ASL-2.0 and LGPL-2.1+
+
+        Contributions from: Beniamino Galvani, David Herrmann, Thomas Haller,
+                            Tom Gundersen
+
+        - Tübingen, 2018-08-08