PT-2340 - Support MySQL 8.4

- Tests for the minimal SSL support
- Updated util/update-modules, so they don't skip tools with modules, not defined in lib

t/pt-index-usage/ssl.t

@@ -0,0 +1,103 @@
+#!/usr/bin/env perl
+
+BEGIN {
+   die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
+      unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
+   unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
+};
+
+use strict;
+use warnings FATAL => 'all';
+use English qw(-no_match_vars);
+use Test::More;
+
+use PerconaTest;
+require "$trunk/bin/pt-index-usage";
+require VersionParser;
+
+use Sandbox;
+my $dp  = new DSNParser(opts=>$dsn_opts);
+my $sb  = new Sandbox(basedir => '/tmp', DSNParser => $dp);
+my $dbh = $sb->get_dbh_for('source');
+
+if ( !$dbh ) {
+   plan skip_all => 'Cannot connect to sandbox source';
+}
+if ( !@{ $dbh->selectall_arrayref("show databases like 'sakila'") } ) {
+   plan skip_all => "Sakila database is not loaded";
+}
+
+my $cnf     = '/tmp/12345/my.sandbox.cnf';
+my @args    = ('-F', $cnf);
+my $samples = "t/pt-index-usage/samples/";
+my ($output, $exit_code);
+
+$sb->do_as_root(
+   'source',
+   q/CREATE USER IF NOT EXISTS sha256_user@'%' IDENTIFIED WITH caching_sha2_password BY 'sha256_user%password' REQUIRE SSL/,
+   q/GRANT ALL ON sakila.* TO sha256_user@'%'/,
+);
+
+# This query doesn't use indexes so there's an unused PK and
+# an unused secondary index.  Only the secondary index should
+# be printed since dropping PKs is not suggested by default.
+
+($output, $exit_code) = full_output(
+   sub {
+      pt_index_usage::main(
+         @args,
+         qw(--host=127.1 --port=12345 --user=sha256_user --password=sha256_user%password --mysql_ssl=0),
+         "$trunk/$samples/slow001.txt")
+   },
+   stderr => 1,
+);
+
+isnt(
+   $exit_code,
+   0,
+   "Error raised when SSL connection is not used"
+) or diag($output);
+
+like(
+   $output,
+   qr/Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection./,
+   'Secure connection error raised when no SSL connection used'
+) or diag($output);
+
+($output, $exit_code) = full_output(
+   sub {
+      pt_index_usage::main(
+         @args,
+         qw(--host=127.1 --port=12345 --user=sha256_user --password=sha256_user%password --mysql_ssl=1),
+         "$trunk/$samples/slow001.txt")
+   },
+   stderr => 1,
+);
+
+is(
+   $exit_code,
+   0,
+   "No error for user, identified with caching_sha2_password"
+) or diag($output);
+
+unlike(
+   $output,
+   qr/Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection./,
+   'No secure connection error'
+) or diag($output);
+
+like(
+   $output,
+   qr/ALTER TABLE `sakila`.`film_text` DROP KEY `idx_title_description`; -- type:non-unique/,
+   'A simple query that does not use any indexes',
+) or diag($output);
+
+# #############################################################################
+# Done.
+# #############################################################################
+$sb->do_as_root('source', q/DROP USER 'sha256_user'@'%'/);
+
+$sb->wipe_clean($dbh);
+ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
+done_testing;
+exit;