PT-2340 - Support MySQL 8.4

- Updated modules and tests for pt-table-sync, pt-table-usage, pt-upgrade, pt-variable-advisor

bin/pt-variable-advisor

@@ -2034,7 +2034,7 @@ sub get_cxn_params {
       $dsn = 'DBI:mysql:' . ( $info->{D} || '' ) . ';'
          . join(';', map  { "$opts{$_}->{dsn}=$info->{$_}" }
                      grep { defined $info->{$_} }
-                     qw(F h P S A))
+                     qw(F h P S A s))
          . ';mysql_read_default_group=client'
          . ($info->{L} ? ';mysql_local_infile=1' : '');
    }
@@ -3425,6 +3425,13 @@ sub get_rules {
          return $args{variables}->{init_slave} ? 1 : 0;
       },
    },
+   {
+      id   => 'init_replica',
+      code => sub {
+         my ( %args ) = @_;
+         return $args{variables}->{init_replica} ? 1 : 0;
+      },
+   },
    {
       id   => 'innodb_additional_mem_pool_size',
       code => sub {
@@ -3671,6 +3678,13 @@ sub get_rules {
          return _var_gt($args{variables}->{slave_net_timeout}, 60);
       },
    },
+   {
+      id   => 'replica_net_timeout',
+      code => sub {
+         my ( %args ) = @_;
+         return _var_gt($args{variables}->{replica_net_timeout}, 60);
+      },
+   },
    {
       id   => 'slave_skip_errors',
       code => sub {
@@ -3679,6 +3693,14 @@ sub get_rules {
              && $args{variables}->{slave_skip_errors} ne 'OFF' ? 1 : 0;
       },
    },
+   {
+      id   => 'replica_skip_errors',
+      code => sub {
+         my ( %args ) = @_;
+         return $args{variables}->{replica_skip_errors}
+             && $args{variables}->{replica_skip_errors} ne 'OFF' ? 1 : 0;
+      },
+   },
    {
       id   => 'sort_buffer_size-1',
       code => sub {
@@ -5538,7 +5560,7 @@ verbosity, you'll see subsequent sentences.
 
 severity: note
 
-Are you trying to write to more than one server in a dual-master or
+Are you trying to write to more than one server in a dual-source or
 ring replication configuration?  This is potentially very dangerous and in
 most cases is a serious mistake.  Most people's reasons for doing this are
 actually not valid at all.