fix sending more than 16MB

[kobi97]

Hello krowinski

I found one bug.

• Not support to send more than 16MB
  -- https://dev.mysql.com/doc/internals/en/mysql-packet.html
  -- https://dev.mysql.com/doc/internals/en/sending-more-than-16mbyte.html

so I fixed it and you can reference my code and my test Environment.

I think you can have more good solution. :)

Thank A lot~

---

This is my test Environment.

• mariadb-10.0.27
• php-mysql-replication 3.0.1 (I have plan to upgrade your lastest version soon.)
• QUERY
  -- CREATE DATABASE binlog_sample;
  -- CREATE TABLE binlog_sample.table1 (id int NOT NULL AUTO_INCREMENT,
  data LONGTEXT, admin_id VARCHAR(255), PRIMARY KEY(id)
  );
  -- INSERT INTO binlog_sample.table1 (data, admin_id) VALUES ({20megadatas}, 'admin1');
• My.cnf
  -- max_allowed_packet = 32M //default: 16M
  -- innodb_log_file_size = 250M //default: 50M
  -- ...

[krowinski]

Great job! Tx