committing changes in /etc made by "apt-get upgrade"

Package changes:
-libmysqlclient21 8.0.20-0ubuntu0.20.04.1 amd64
+libmysqlclient21 8.0.21-0ubuntu0.20.04.3 amd64
-libsqlite3-0 3.31.1-4ubuntu0.1 amd64
+libsqlite3-0 3.31.1-4ubuntu0.2 amd64
-mysql-client-8.0 8.0.20-0ubuntu0.20.04.1 amd64
-mysql-client-core-8.0 8.0.20-0ubuntu0.20.04.1 amd64
+mysql-client-8.0 8.0.21-0ubuntu0.20.04.3 amd64
+mysql-client-core-8.0 8.0.21-0ubuntu0.20.04.3 amd64
-mysql-server 8.0.20-0ubuntu0.20.04.1 all
+mysql-server 8.0.21-0ubuntu0.20.04.3 all
-mysql-server-8.0 8.0.20-0ubuntu0.20.04.1 amd64
-mysql-server-core-8.0 8.0.20-0ubuntu0.20.04.1 amd64
+mysql-server-8.0 8.0.21-0ubuntu0.20.04.3 amd64
+mysql-server-core-8.0 8.0.21-0ubuntu0.20.04.3 amd64

diff --git a/mysql/FROZEN b/mysql/FROZEN
new file mode 120000 (symlink)
index 0000000..2bc63ae
--- /dev/null
+++ b/mysql/FROZEN
@@ -0,0 +1 @@
+../../usr/share/doc/mysql-common/frozen-mode/downgrade
\ No newline at end of file