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-upgrade/ssl.t

@@ -0,0 +1,105 @@
+#!/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 File::Basename;
+use File::Temp qw(tempdir);
+
+$ENV{PERCONA_TOOLKIT_TEST_USE_DSN_NAMES} = 1; 
+$ENV{PRETTY_RESULTS} = 1; 
+
+use PerconaTest;
+use Sandbox;
+require "$trunk/bin/pt-upgrade";
+
+my $dp = new DSNParser(opts=>$dsn_opts);
+my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp);
+my $dbh1 = $sb->get_dbh_for('host1');
+
+
+if ( !$dbh1 ) {
+   plan skip_all => 'Cannot connect to sandbox host1'; 
+}
+
+my $host1_dsn   = $sb->dsn_for('host1');
+my $tmpdir      = tempdir("/tmp/pt-upgrade.$PID.XXXXXX", CLEANUP => 1);
+my $samples     = "$trunk/t/pt-upgrade/samples";
+my $lib_samples = "$trunk/t/lib/samples";
+my ($output, $exit_code);
+
+# #############################################################################
+# genlog
+# #############################################################################
+
+`rm -f /tmp/test_select_into_*.log`;
+
+$sb->do_as_root(
+   'host1',
+   q/CREATE USER IF NOT EXISTS sha256_user@'%' IDENTIFIED WITH caching_sha2_password BY 'sha256_user%password' REQUIRE SSL/,
+   q/GRANT ALL ON *.* TO sha256_user@'%'/,
+);
+
+($output, $exit_code) = full_output(
+   sub {
+      pt_upgrade::main("${host1_dsn},u=sha256_user,p=sha256_user%password,s=0", '--save-results', $tmpdir,
+         qw(--type rawlog),
+         "$samples/select_into.log",
+   )},
+   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, $exit_code) = full_output(
+   sub {
+      pt_upgrade::main("${host1_dsn},u=sha256_user,p=sha256_user%password,s=1", '--save-results', $tmpdir,
+         qw(--type rawlog),
+         "$samples/select_into.log",
+   )},
+   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);
+
+is(
+   $exit_code,
+   0,
+   "Does not fail on SELECT...INTO statements"
+);
+
+# #############################################################################
+# Done.
+# #############################################################################
+$sb->do_as_root('host1', q/DROP USER 'sha256_user'@'%'/);
+
+$sb->wipe_clean($dbh1);
+ok($sb->ok(), "Sandbox servers") or BAIL_OUT(__FILE__ . " broke the sandbox");
+done_testing;