[#2020] MySQL upgrade scripts renumbered

- it's just a leading 00s added in lots of places

src/share/database/scripts/mysql/upgrade_009.5_to_009.6.sh.in

@@ -0,0 +1,70 @@
+#!/bin/sh
+
+# Copyright (C) 2021 Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# shellcheck disable=SC1091
+# SC1091: Not following: ... was not specified as input (see shellcheck -x).
+
+# Exit with error if commands exit with non-zero and if undefined variables are
+# used.
+set -eu
+
+# shellcheck disable=SC2034
+# SC2034: ... appears unused. Verify use (or export if used externally).
+prefix="@prefix@"
+
+# Include utilities. Use installed version if available and
+# use build version if it isn't.
+if [ -e @datarootdir@/@PACKAGE_NAME@/scripts/admin-utils.sh ]; then
+    . "@datarootdir@/@PACKAGE_NAME@/scripts/admin-utils.sh"
+else
+    . "@abs_top_builddir@/src/bin/admin/admin-utils.sh"
+fi
+
+# Check version.
+version=$(mysql_version "${@}")
+if test "${version}" != "9.5"; then
+    printf 'This script upgrades 9.5 to 9.6. '
+    printf 'Reported version is %s. Skipping upgrade.\n' "${version}"
+    exit 0
+fi
+
+# Add column only if it doesn't exist to work around the 1.9.4 leak of
+# cache_threshold and cache_max_age column alters in subnet and shared network
+# tables in schema version 9.5.
+if ! mysql "${@}" -e 'SELECT cache_threshold FROM dhcp4_subnet LIMIT 1' &> /dev/null; then
+    mysql "${@}" <<EOF
+# Add new lease cache parameters.
+ALTER TABLE dhcp4_subnet
+    ADD COLUMN cache_threshold FLOAT DEFAULT NULL,
+    ADD COLUMN cache_max_age INT(10) DEFAULT NULL;
+
+ALTER TABLE dhcp4_shared_network
+    ADD COLUMN cache_threshold FLOAT DEFAULT NULL,
+    ADD COLUMN cache_max_age INT(10) DEFAULT NULL;
+
+ALTER TABLE dhcp6_subnet
+    ADD COLUMN cache_threshold FLOAT DEFAULT NULL,
+    ADD COLUMN cache_max_age INT(10) DEFAULT NULL;
+
+ALTER TABLE dhcp6_shared_network
+    ADD COLUMN cache_threshold FLOAT DEFAULT NULL,
+    ADD COLUMN cache_max_age INT(10) DEFAULT NULL;
+EOF
+fi
+
+mysql "${@}" <<EOF
+# Add an auto-increment ID as primary key to support Percona.
+ALTER TABLE logs
+    ADD id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY;
+
+# Update the schema version number
+UPDATE schema_version
+    SET version = '9', minor = '6';
+
+# This line concludes database upgrade to version 9.6.
+EOF