Prep v0.20.11

docs/NEWS

@@ -1,3 +1,21 @@
+v0.20.11
+========
+Release date: 2023-01-05
+
+Releases v0.20.0 to v0.20.10 are all build-system/CI/CD-related tweaks and
+basically irrelevant to end users.
+
+The following is the release notes for v0.20.0:
+
+This is a small, but important release that adds support for loadable
+plugins, and also the LineFileAdvanced file reader that allows log
+rotation-based file reading (e.g.: Move a file, send sigup, then parse it).
+
+The plugin support is very much experimental, see docs/plugins.rst for
+discussion. There's also an example-plugin at
+https://github.com/telenornms/skogul-plugin-example which demonstrates how
+to build an out-of-tree plugin.
+
 v0.20.10
 ========