Zabbix

...G...... [ZBXNEXT-6708] added TLS/SSL website certificates validation plugin to Zabbix agent 2

* commit '66307509fb58bc020f2b56a184a06f84a03587dc':
  .......... [ZBXNEXT-5931] added readme
  ...G...... [ZBXNEXT-6708] code clean up
  ...G...... [ZBXNEXT-6708] fixing sub issues
  ...G...... [ZBXNEXT-6708] fixed issue with empty third parameter
  ...G...... [ZBXNEXT-6708] added sha256_fingerprint and changed serial number to hex
  ...G...... [ZBXNEXT-6708] code clean-up
  ...G...... [ZBXNEXT-6708] added plugin to windows/macos plugin list
  ...G...... [ZBXNEXT-6708] added TLS/SSL website certificates validation to plugin in Zabbix agent 2
  ...G...... [ZBXNEXT-6708] added basic logic for TLS/SSL website certificates plugin in Zabbix agent 2